Sanyo Mini ECO-i CHXR03652 Service Manual

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SERVICE MANUAL

Outdoor Units

Class

Mini ECO-i

Indoor Units

Class

4-Way Air Discharge Semi-Concealed

1-Way Air Discharge Semi-Concealed

Concealed Duct

Concealed Duct High-Static Pressure

Ceiling-Mounted

Wall-Mounted

85464849268000

MINI ECO-i SYSTEM

CHX03652

CHX05252

CHXR03652

CHXR05252

XHX1252

XMHX1252 XMHX1852

AHX0752

AHX0952

AHX1252

UHX0752

UHX1252

THX1252

KHX0752

KHX0952

KHX1252

XHX1852

XHX2452

XHX3652

UHX1852

UHX2452

UHX3652

DHX3652

THX1852

THX2452

KHX1852

KHX2452

SM830168-00

REFERENCE NO.

DHX4852

Table of Contents

Summary of Contents for Sanyo Mini ECO-i CHXR03652

Page 1 SERVICE MANUAL MINI ECO-i SYSTEM Outdoor Units Class CHX03652 CHX05252 Mini ECO-i CHXR03652 CHXR05252 Indoor Units Class 4-Way Air Discharge Semi-Concealed XHX1252 XHX1852 XHX2452 XHX3652 4-Way Air Discharge Semi-Concealed XMHX1252 XMHX1852 1-Way Air Discharge Semi-Concealed AHX0752 AHX0952 AHX1252 Concealed Duct UHX0752 UHX1252 UHX1852...
Page 3 Check of Density Limit 2. The standards for minimum room volume are as fol- lows. The room in which the air conditioner is to be (1) No partition (shaded portion) installed requires a design that in the event of refrig- erant gas leaking out, its density will not exceed a set limit.
Page 4: Table Of Contents
CONTENTS Section 1: CONTROL FUNCTIONS ......... . 1-1 1.
Page 5: Control Functions
Mini ECO-i SYSTEM Contents Control Functions 1. CONTROL FUNCTIONS 1. Introduction ............1-2 2.
Page 6: Introduction
Mini ECO-i SYSTEM 1. Introduction Control Functions OUTDOOR UNIT Mini ECO-i is a multi system that is connected to a single outdoor unit. The outdoor unit contains an inverter com- pressor. To operate this system, the below settings must be made at the time of the test run. Table 1-1 At shipment Setting item...
Page 7: Compressor Control
Mini ECO-i SYSTEM 2. Compressor Control Control Functions 2-1. Compressors Mounted on Outdoor Units Capacity Type Compressors mounted Rotary DC Inverter 2-2. Compressor Stop Rules After a compressor stops, it will not start again for a period of 3 minutes (3 minutes forced OFF). However, this does not apply to the Special Control described later, when operation of the compressor is forcibly stopped as part of a control operation.
Page 8 Mini ECO-i SYSTEM 2. Compressor Control Control Functions 2-3-1. Roadmap control in cooling mode With this control, the below evaporation temperature control and condensation temperature control are both used. Control is performed according to the following order of priority: Control order of priority Area C >...
Page 9 Mini ECO-i SYSTEM 2. Compressor Control Control Functions 2-3-2. Roadmap control in heating mode Roadmap control is performed using the below condensation temperature control. Condensation temperature (=Tc) control (Area D) Thermostat OFF 133.7°F 133.5°F Horsepower decrease (Area C) 123.9°F 123.8°F Horsepower increase prohibited (Area B) 120.2°F...
Page 10 Mini ECO-i SYSTEM 2. Compressor Control Control Functions Current protection Inverter compressor current control is composed of primary current control and secondary current control. Current protection control for the inverter compressor is performed by self-protection in the inverter circuit, and is not based on a calculated increase/decrease in compressor capacity.
Page 11: Special Controls
Mini ECO-i SYSTEM 3. Special Controls Control Functions In addition to ordinary heating and cooling operation, this system also includes the following 4 types of special controls for control of the system as a whole: 3-1. 4-way valve switching control 3-2.
Page 12 Mini ECO-i SYSTEM 3. Special Controls Control Functions 3-2. Reverse Cycle Start Control Reverse cycle start control is performed under the following conditions: • The outdoor unit starts in Heating mode after microcomputer initialization when the power was turned ON. •...
Page 13 Mini ECO-i SYSTEM 3. Special Controls Control Functions 3-4-3. Frost detection Frost is not detected at the outdoor unit heat exchanger for 5 minutes after operation starts. Frost is detected when either Condition 1 or 2 below is met. Heat exchange liquid temperature °F Defrosting operation (The end temperature is Condition 1:...
Page 14: Other Control
Mini ECO-i SYSTEM 4. Other Control 5. Operation of Solenoid Valves Control Functions 6. Outdoor Unit Electronic Control Valve (Motor Valve) Control [MOV1] 4. Other Control 4-1. Indoor Unit Self-Separator Oil Recovery Control Refer to the indoor unit special control item. 5.
Page 15: Outdoor Fan Control
Mini ECO-i SYSTEM 7. Outdoor Fan Control Control Functions 7-1. Outdoor Fan (Min. Fan Mode and Max. Fan Mode) These outdoor units utilize a DC fan motor that can be controlled using a maximum of 15 increments (15 fan modes). Outdoor unit Min.
Page 16: Indoor Unit Electronic Control Valve Control
Mini ECO-i SYSTEM 8. Indoor Unit Electronic Control Valve Control Control Functions INDOOR UNIT 8-1. During Normal Control During Cooling mode operation Electronic control valve position (pulses) Outdoor unit operating Outdoor unit stopped Stop 20 pulses 20 pulses 20 pulses 20 pulses Thermostat OFF 20 pulses...
Page 17: Indoor Special Control
Mini ECO-i SYSTEM 8. Indoor Unit Electronic Control Valve Control Control Functions 9. Indoor Special Control 8-2. During Special Control Control type Operating mode Target indoor units Electronic control valve position (pulses) Fixed pulses for cooling, corresponding to Cooling All indoor units the indoor unit capacity 4-way valve switching control...
Page 18: Discharge Gas Temperature
Mini ECO-i SYSTEM 10. Discharge Gas Temperature Control Functions 11. Current Protection 10-1. Discharge Gas Temperature Protection Alarm The compressor upper-limit discharge temperature is 222°F. If the discharge temperature reaches 222°F, then the compressor stops. If the discharge temperature reaches 222°F 4 times repeatedly after restart, an alarm occurs.
Page 19: Pressure Sensor Failure
Mini ECO-i SYSTEM 11. Current Protection 12. Pressure Sensor Failure Control Functions 13. 4-Way Valve Failure [L18] 11-2. Inverter Compressor Alarm Description Occurs when overcurrent (32.5 A) is detected during normal operation. Occurs under the same conditions as P16, when the inverter compressor is operating at 80 Hz or higher.
Page 20: Servicing And Maintenance Functions
Mini ECO-i SYSTEM 14. Servicing and Maintenance Functions Control Functions The below functions are available, and are selected by the outdoor unit EEPROM settings. 14-1. Outdoor Unit Noise Countermeasures (outdoor Quiet mode function) This function reduces the operating noise to lessen the noise produced by the outdoor unit. When this mode is selected, noise reduction is given priority during operation, and the outdoor fan mode and compressor operating frequency are restricted (to approximately 80% of capacity).
Page 21: Outdoor Unit Repair Procedures
Mini ECO-i SYSTEM Contents Outdoor Unit Repair Procedures 2. OUTDOOR UNIT REPAIR PROCEDURES Layout Diagram: Sensors and Solenoid Valves ....... . . 2-2 Layout Diagram: Sensors .
Page 22: Layout Diagram: Sensors And Solenoid Valves
Mini ECO-i SYSTEM Layout Diagram: Sensors and Solenoid Valves Outdoor Unit Repair Procedures (suction thermistor) (electronic motor-operated valve) (4-way valve) (condenser 1 thermistor) 2 - 2...
Page 23: Layout Diagram: Sensors
Mini ECO-i SYSTEM Layout Diagram: Sensors Outdoor Unit Repair Procedures (suction thermistor) (condenser 1 thermistor) 2 - 3...
Page 24: Removing Panels
Mini ECO-i SYSTEM 1. Removing Panels Outdoor Unit Repair Procedures (1) Front panel removal (Fig. 1) • Remove the front panel (remove 3 screws). (2) Cover A removal (Fig. 1) • Remove the cover A (remove 1 screw). Front panel Cover A Fig.
Page 25: Discharging Oil In Compressor
Mini ECO-i SYSTEM 2. Discharging Oil in Compressor Outdoor Unit Repair Procedures Recover the refrigerant in the outdoor unit following the procedures in “3. Recovering Refrigerant.” Remove the compressor and discharge the oil in it. Refer to “8. Compressor” for detailed procedures. 2-1.
Page 26: Recovering Refrigerant
Mini ECO-i SYSTEM 3. Recovering Refrigerant Outdoor Unit Repair Procedures The following equipment and tools are required: Jumper wire with clips, adjustable wrench, set of manifold gauge valves specially designed for refrigerant R410A only, vacuum pump, refrigerant recovery unit, pre-purged refrigerant cylinder for recovery (air already evacuated), and hex wrench (4 mm for liquid tube and 5 mm for gas tube).
Page 27 Mini ECO-i SYSTEM 3. Recovering Refrigerant Outdoor Unit Repair Procedures 3-2. Refrigerant Recovery Procedures (Indoor Unit) The flowchart below shows the refrigerant recovery procedures you must follow when replacing or repairing the indoor unit due to trouble in the refrigerant circuit. START 3-2-1.
Page 28 Mini ECO-i SYSTEM 3. Recovering Refrigerant Outdoor Unit Repair Procedures 3-2-1. Cooling operation (for all units) Short-circuit the TEST pin (CN44) on the outdoor control PCB. Let the unit operate for a while, then check if it is running in Cooling mode or Heating mode by touching the gas line with your finger.
Page 29 Mini ECO-i SYSTEM 3. Recovering Refrigerant Outdoor Unit Repair Procedures Manifold gauge Refrigerant recovery unit Refrigerant Ball valve recovery cylinder (separately purchased) Gas tube Service port Indoor unit Outdoor unit Liquid tube Fig. 4 2 - 9...
Page 30 Mini ECO-i SYSTEM 3. Recovering Refrigerant Outdoor Unit Repair Procedures 3-2-3. Refrigerant recovery procedures (B): for indoor unit with no ball valve Refrigerant in all indoor units and the refrigerant tubing circuit must be pumped into the outdoor unit (referred to as “pump down”).
Page 31: Checking For Leakage After Repair
Mini ECO-i SYSTEM 4. Checking for Leakage After Repair Outdoor Unit Repair Procedures 4-1. Pressure Check for Leakage of Outdoor Unit After completing repair of the outdoor unit, carry out the following leakage check. Check that all service valves for gas line, and liquid line in the repaired outdoor unit are fully closed. Connect the manifold gauge valves to the high- and low-pressure sensor outlets of the outdoor unit.
Page 32: Evacuating System
Mini ECO-i SYSTEM 5. Evacuating System Outdoor Unit Repair Procedures This procedure is carried out to ensure there is no remaining refrigerant or other gases (nitrogen, etc.) in the repaired outdoor unit and tubing. 5-1. Evacuating Repaired Outdoor Unit Check that each service valve of the gas line, and the liquid line in the outdoor unit are fully closed. * If the AP pins (CN46) on the outdoor control PCB have already been short-circuited, steps (2) and (5) are not necessary.
Page 33: Charging Compressor Oil
Mini ECO-i SYSTEM 6. Charging Compressor Oil Outdoor Unit Repair Procedures 6-1. If Refrigerant Has Already Been Charged to Outdoor Unit Be sure to use an exclusive oil-charging tank for charging compressor oil. Prior to charging, carry out vacuum of the tank and take care that no air (in the form of bubbles) is permitted to enter the tank.
Page 34 Mini ECO-i SYSTEM 6. Charging Compressor Oil Outdoor Unit Repair Procedures Open to run, then close to stop Manifold gauge Upper side valve Close to stop Lower side valve Vacuum pump Fig. 10 (3) Charging compressor oil into outdoor unit Connect the lower valve to the low-pressure sensor outlet (with Schrader-type, push-to-release valve) in the outdoor unit to be oil-charged, and then connect the high-pressure sensor outlet (with push-to-release valve) to the upper valve via the manifold gauge valves (at Hi-pressure gauge side).
Page 35 Mini ECO-i SYSTEM 6. Charging Compressor Oil Outdoor Unit Repair Procedures Next, start Cooling mode operation of the outdoor unit to be oil-charged. When cooling operation reaches a stable condition, open each valve corresponding to these procedures in the order given: Procedure 1: Open the Hi-side gauge manifold valve Procedure 2: Open the upper valve Procedure 3: Open the lower valve...
Page 36 Mini ECO-i SYSTEM 6. Charging Compressor Oil Outdoor Unit Repair Procedures 6-2. If Outdoor Unit Has Not Been Charged with Refrigerant When a compressor has been replaced or in any other case where the outdoor unit has not been charged with refrigerant, first charge with refrigerant then follow the instructions in “6-1.
Page 37: Pumping Out Refrigerant From Outdoor Unit
Mini ECO-i SYSTEM 7. Pumping Out Refrigerant from Outdoor Unit Outdoor Unit Repair Procedures Required equipment and tools: Jumper wire with clips, adjustable wrench, set of manifold gauge valves, vacuum pump, refrigerant recovery unit, pre-purged refrigerant cylinder for recovery, and hex wrench (4 mm for liquid tube and 5 mm for gas tube).
Page 38 Mini ECO-i SYSTEM 7. Pumping Out Refrigerant from Outdoor Unit Outdoor Unit Repair Procedures NOTE To determine the completion of refrigerant recovery, follow the instructions that came with the refrigerant recovery unit. Low-pressure outlet port (For ø5/16" connector) Manifold gauge Connect from here to refrigerant recovery unit Fig.
Page 39: Compressor
Mini ECO-i SYSTEM 8. Compressor Outdoor Unit Repair Procedures 8-1. Compressor Trouble Diagnosis and Check Methods Generally, compressor failures can be classified into the following categories. Mechanical trouble (A) Locking (intrusion of foreign objects, galling, etc.) (B) Pressure rise failure (damaged valve, seal, bearing, or other component) (C) Noise (damaged stator, rotor, valve, or other component) Electrical trouble (A) Coil burning...
Page 40 Mini ECO-i SYSTEM 8. Compressor Outdoor Unit Repair Procedures The connecting port includes a Schrader-type, push-to-release valve. CAUTION When disconnecting the hose, pressure will be applied from the refrigerant in the outdoor unit. Follow the instructions in “8-3. Dry Core Cleaning” and perform dry core cleaning of the outdoor unit that failed. 8-3.
Page 41 Mini ECO-i SYSTEM 8. Compressor Outdoor Unit Repair Procedures (18) Remove dry cores. Connect the tube that runs Outdoor unit from the liquid tube valve to the ball valve. Liquid tube service port (19) At the outdoor unit where dry cores were removed, pressurize with 362.6 psi of nitrogen from the liquid tube service port and check for leaks.
Page 42: High Pressure Sensor
Mini ECO-i SYSTEM 8. Compressor Outdoor Unit Repair Procedures 9. High Pressure Sensor Installation Prepare for installation. • Remove the rubber stopper and tube cap (welded) from the new compressor. Install the crankcase heater onto the compressor. Place the cushioning rubber in the designated positions on the compressor. (There are 3 pieces for an inverter compressor.) Set the new compressor into the unit.
Page 43: Outdoor Unit Maintenance Remote Controller
Mini ECO-i SYSTEM Contents Outdoor Unit Maintenance Remote Controller 3. OUTDOOR UNIT MAINTENANCE REMOTE CONTROLLER 1. Overview ............. . 3-2 2.
Page 44: Overview
Mini ECO-i SYSTEM 1. Overview Outdoor Unit Maintenance Remote Controller OUTDOOR UNIT MAINTENANCE REMOTE [Service Checker Section] CONTROLLER (RCS-TM80BG) for MINI ECO-i ■ About the outdoor unit maintenance remote controller The outdoor unit utilizes nonvolatile memory (EEPROM) on its PCB. This allows EEPROM data to replace the setting switches that were present on previous PCBs.
Page 45: Functions
Mini ECO-i SYSTEM 2. Functions Outdoor Unit Maintenance Remote Controller ■ Functions on the ordinary display (1) Functions: Button operations can be used to perform the following functions. • Start/stop of all indoor units • Switching between cooling and heating •...
Page 46: Ordinary Display Controls And Functions
Mini ECO-i SYSTEM 3. Ordinary Display Controls and Functions Outdoor Unit Maintenance Remote Controller ■ Functions on the ordinary display • Connect the special service checker wiring to the outdoor unit PCB. The connection is shown in the figure below. Outdoor unit PCB RC (3P, BLU) PCB connector (3P, BLU)
Page 47 Mini ECO-i SYSTEM 3. Ordinary Display Controls and Functions Outdoor Unit Maintenance Remote Controller ● All units start/stop (Fig. 1) <Operation> (ON/OFF operation) button can be used to start and stop all the indoor units. • The LED illuminates if any indoor units is operating. •...
Page 48 Mini ECO-i SYSTEM 3. Ordinary Display Controls and Functions Outdoor Unit Maintenance Remote Controller ■ Display (functions) • Use the temperature setting buttons to change the item code. Item code Item Remarks Outdoor unit alarm Alarm code display No. of connected indoor units Quantity Unit Nos.
Page 49 Mini ECO-i SYSTEM 3. Ordinary Display Controls and Functions Outdoor Unit Maintenance Remote Controller ■ XX-YY R.C. (Fig. 4) Displays the outdoor unit sub-bus address which is currently selected. XX = Outdoor system address on main bus line (1 – 30) YY = Outdoor unit sub-bus address.
Page 50 Mini ECO-i SYSTEM 3. Ordinary Display Controls and Functions Outdoor Unit Maintenance Remote Controller ■ Concerning the 7-segment, 4-digit display remote controller timer display The unit Nos. of connected units are indicated by four 7-segment digits ( ) and a colon. ●...
Page 51: Monitoring Operations
Mini ECO-i SYSTEM 4. Monitoring Operations Outdoor Unit Maintenance Remote Controller Display the indoor unit and outdoor unit sensor temperatures. <Operating procedure> ➀ Press and hold the (CHECK) button and buttons simultaneously for 4 seconds or longer to engage temperature monitor mode. During temperature monitoring, is illuminates.
Page 52 Mini ECO-i SYSTEM 4. Monitoring Operations Outdoor Unit Maintenance Remote Controller ■ Display of unit No. 1 Description Remarks Intake temp. °F °F °F °F Indoor unit Discharge temp. °F Discharge temp. setting °F Indoor unit electronic control valve position STEP Discharge temp.
Page 53: Outdoor Unit Alarm History Monitor
Mini ECO-i SYSTEM 5. Outdoor Unit Alarm History Monitor Outdoor Unit Maintenance Remote Controller • Displays outdoor unit alarms only. • Check the indoor unit alarm histories separately using the indoor unit remote controllers or other control device. <Operating procedure> ➀...
Page 54: Mode Settings
Mini ECO-i SYSTEM 6. Mode Settings Outdoor Unit Maintenance Remote Controller ■ Setting mode 1 Display of ﬁ rst 4 digits <Operating procedure> ➀ Press and hold the (CHECK) button and (VENTILATION) button simultaneously for 4 seconds or longer. ➁ Press the temperature setting buttons to change the item code.
Page 55 Mini ECO-i SYSTEM 6. Mode Settings Outdoor Unit Maintenance Remote Controller ■ Setting mode 2 <Operating procedure> ➀ Press and hold the (CHECK) button, button, and button simultaneously for 4 seconds or longer. ➁ Press the temperature setting buttons to change the item code.
Page 56 – MEMO – 3 - 14...
Page 57: Remote Controller Functions
Mini ECO-i SYSTEM Contents Remote Controller Functions 4. REMOTE CONTROLLER FUNCTIONS 1. Simple Settings Function ..........4-2 2.
Page 58: Simple Settings Function
Mini ECO-i SYSTEM 1. Simple Settings Function Remote Controller Functions • This allows the filter lifetime, operating mode [Remote Controller Functions Section] priority change, central control address, and other settings to be made for an individual or group- control indoor unit to which the remote controller used for simple settings is connected.
Page 59 Mini ECO-i SYSTEM 1. Simple Settings Function Remote Controller Functions List of Simple Setting Items Setting data Item code Item Description 0000 Not displayed 0001 150 hours 0002 2,500 hours Filter sign ON time (ﬁ tlter life time) 0003 5,000 hours 0004 10,000 hours 0005...
Page 60: Detailed Settings Function
Mini ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions • This allows the system address, indoor unit address, and other settings to be made for the individual or group-control indoor unit to which the remote controller used for detailed settings is connected.
Page 61 Mini ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions List of Detailed Setting Items Setting data Item code Item Description Description Description 1-Way Air Discharge 4-Way Air Discharge 0000 0001 0005 Concealed-Duct (U) Semi-Concealed (A) Semi-Concealed (X, XM) Type Concealed-Duct High 0006 0007...
Page 62 Mini ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions Setting data Item code Item Description 0000 5 minutes (1B) Forced thermostat ON time 0001 4 minutes –010 –20°F –009 –18°F Cooling discharge –008 –16°F temperature shift 0010 +20°F –010 –20°F –009 –18°F...
Page 63 Mini ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions Setting data Item code Item Description 0000 No forced operation 0001 Forced operation for 1 minute Automatic drain pump operation 0060 Continuous operation 0000 None Ventilation fan operation 0001 Ventilation fan operated by remote controller. Wired remote controller 0000 Not used.
Page 64 Mini ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions Setting data Item code Item Description DC fan tap operating Purpose mode 0000 Standard Standard (setting at shipment) High ceiling use High ceiling setting 1 (with standard panel) 0001 For low Ultra long-life ﬁ...
Page 65 Mini ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions Simple setting items Item code Item Description Filter sign ON time setting Changes the indoor unit ﬁ lter lifetime when a high-performance ﬁ lter or other (ﬁ lter lifetime) optional product is installed. Reduces the ﬁ...
Page 66 Mini ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions Item code Item Description Set when using a central control device. Central control address Used when setting the central control address manually from the remote controller. Operating mode priority change Note (1) NOTE (1) Explanation of operation mode priority change...
Page 67 Mini ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions When the operating mode at the priority remote controller is changed, the operating modes of other remote controllers change as shown below. Mode change at priority remote controller Operating modes at other remote controllers Current mode New mode Current mode...
Page 68 Mini ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions Item code Item Description Unit type Set when the indoor unit EEPROM memory is replaced during servicing. Indoor unit capacity System (outdoor unit) address These are not set at the time of shipping from the factory. These must be set after installation if automatic address setting is not Indoor unit address performed.
Page 69 Mini ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions Item code Item Description 1F (Upper limit) Cooling 20 (Lower limit) 21 (Upper limit) This setting changes the temperature range (upper limit and lower limit) Heating 22 (Lower limit) Change to the remote which is set from the remote controller or central control device.
Page 70 Mini ECO-i SYSTEM 2. Detailed Settings Function Remote Controller Functions (Continued from previous page) Item code Item Description Heat exchanger temperature for The heat exchanger temperature control point for prevention of cold air cold air discharge discharge during heating operation can be changed. The indoor unit PCB optional output for the fan can be switched Fan output switching according to the purpose of use.
Page 71: Remote Controller Servicing Functions
Mini ECO-i SYSTEM 3. Remote Controller Servicing Functions Remote Controller Functions • The remote controller includes a number of servicing functions. Use these as needed for test runs and inspections. List of Servicing Functions Functions Description Button operation Reset operation Unit status Operation with Press and hold the...
Page 72 Mini ECO-i SYSTEM 3. Remote Controller Servicing Functions Remote Controller Functions Test Run Function Operates the unit with the thermostat forced ON. <Procedure> ➀ Press and hold the button for 4 seconds or longer. ➁ “Test” appears on the remote controller LCD display (Fig.
Page 73 Mini ECO-i SYSTEM 3. Remote Controller Servicing Functions Remote Controller Functions ■ Sensor Temperature Display Function (displayed regardless of whether unit is operating or stopped) The procedure below displays the sensor temperatures from the remote controller, indoor unit, and outdoor unit on the remote controller. <Procedure>...
Page 74 Mini ECO-i SYSTEM 3. Remote Controller Servicing Functions Remote Controller Functions Outdoor unit sensors Indoor unit sensors Unit No.1 Intake temp. Discharge temp. 1 — High-pressure sensor temp. Heat exchanger gas 1 Heat exchanger liquid 1 — Discharge temp. — Discharge temp.
Page 75: Trouble Diagnosis
Mini ECO-i SYSTEM Contents Trouble Diagnosis 5. TROUBLE DIAGNOSIS 1. Contents of Remote Controller Switch Alarm Display ......5-2 2.
Page 76: Contents Of Remote Controller Switch Alarm Display
Mini ECO-i SYSTEM 1. Contents of Remote Controller Switch Alarm Display Trouble Diagnosis Blinking: OFF: Wired Wireless remote remote controller control receiver display display Possible cause of malfunction Remote controller is Error in receiving serial communication signal. Serial (Signal from main indoor unit in case of group control) detecting error signal from <E01>...
Page 77 Mini ECO-i SYSTEM 1. Contents of Remote Controller Switch Alarm Display Trouble Diagnosis Blinking: OFF: Wired Wireless remote remote controller control receiver display display Possible cause of malfunction Incorrect discharge temperature. (Comp.) Activation of Protective device in outdoor protective unit is activated. Operation of O sensor device...
Page 78: Outdoor Unit Control Panel Led Display
Mini ECO-i SYSTEM 2. Outdoor Unit Control Panel LED Display Trouble Diagnosis : ON : Blinking : OFF ) Display meaning D042(1) D043(2) After the power is turned ON (and automatic address setting is not in progress), no communica- tion with the indoor units in that system is possible. (Both ON) After power is turned ON (and automatic address setting is not in progress), 1 or more indoor units are confirmed in that system;...
Page 79: Remote Controller Servicing Functions
Mini ECO-i SYSTEM 3. Remote Controller Servicing Functions Trouble Diagnosis Sensor temperature display function (displayed both when unit is running and stopped) Use the following check procedure to display the sensor temperatures from the remote controller, indoor unit, and outdoor unit sensors on the remote controller display. <Check procedure>...
Page 80: Mini Eco-I Alarm Codes
Mini ECO-i SYSTEM 4. Mini ECO-i Alarm Codes Trouble Diagnosis Alarms for outdoor units Alarm Code Alarm Meaning Page Outdoor unit failed to receive serial communication signals from indoor unit. Automatic address setting start is prohibited. Automatic address setting alarm (too few units) Automatic address setting alarm (too many units) No indoor units at automatic address setting.
Page 81 Mini ECO-i SYSTEM 4. Mini ECO-i Alarm Codes Trouble Diagnosis E06 alarm Alarm code Alarm meaning Outdoor unit failed to receive serial communication signals from indoor unit. Alarm conditions No serial communications from indoor unit Probable cause (1) The indoor unit power was cut OFF after initial communications were completed. (2) An open circuit or short circuit occurred in the inter-unit control wiring after initial communications were completed.
Page 82 Mini ECO-i SYSTEM 4. Mini ECO-i Alarm Codes Trouble Diagnosis E16 alarm Alarm code Alarm meaning Automatic address setting alarm (too many units) Alarm conditions • The number of indoor units was too many when automatic address setting was performed. •...
Page 83 Mini ECO-i SYSTEM 4. Mini ECO-i Alarm Codes Trouble Diagnosis F04 alarm Alarm code Alarm meaning Compressor 1 discharge temperature sensor trouble Alarm conditions (1) A temperature of 212°F or higher was detected 20 minutes or longer after that compressor stopped running.
Page 84 Mini ECO-i SYSTEM 4. Mini ECO-i Alarm Codes Trouble Diagnosis F07 alarm Alarm code Alarm meaning Liquid temperature sensor (C1) trouble at outdoor heat exchanger Alarm conditions (1) A/D step is 10 steps or less (short circuit). (2) A/D step is 1014 steps or more (open circuit). Probable cause (1) Sensor malfunction (including connector) (2) PCB malfunction...
Page 85 Mini ECO-i SYSTEM 4. Mini ECO-i Alarm Codes Trouble Diagnosis F16 alarm Alarm code Alarm meaning High-pressure sensor trouble Alarm conditions The saturation temperature at the detected pressure is 10°F or more below the highest indoor-unit E1 temperature continuously for 30 minutes. Probable cause (1) High-pressure sensor malfunction (2) Failure to connect the connector to the outdoor unit PCB...
Page 86 Mini ECO-i SYSTEM 4. Mini ECO-i Alarm Codes Trouble Diagnosis F31 alarm Alarm code Alarm meaning Outdoor unit non-volatile memory (EEPROM) trouble Alarm conditions (1) Non-volatile memory is not present when power initialization occurs. (2) Read values do not match after writing to non-volatile memory is complete. Probable cause (1) Memory was not inserted after the PCB was replaced.
Page 87 Mini ECO-i SYSTEM 4. Mini ECO-i Alarm Codes Trouble Diagnosis H31 alarm Alarm code Alarm meaning HIC trouble alarm Alarm conditions This alarm occurs when the microcomputer identifies a trouble signal (indicating abnormal HIC temperature or other trouble) from the HIC. Probable cause The HIC judges the current and temperature, and outputs the trouble signal.
Page 88 Mini ECO-i SYSTEM 4. Mini ECO-i Alarm Codes Trouble Diagnosis L05 alarm Alarm code Alarm meaning Indoor unit priority duplication (at priority indoor units) Alarm conditions More than 1 indoor unit set for priority was detected. Probable cause More than 1 indoor unit is set for priority. Check From the wired remote controller, use the indoor unit EEPROM simple setting mode and check that the value of item code 04 is “0001.”...
Page 89 Mini ECO-i SYSTEM 4. Mini ECO-i Alarm Codes Trouble Diagnosis L18 alarm Alarm code Alarm meaning 4-way valve operation failure Alarm conditions During heating, when 2 minutes and 30 seconds have elapsed after compressor operation started, the temperature difference between the outdoor air temperature sensor and the heat exchanger liquid temperature sensor (C1) is 40°F or higher.
Page 90 Mini ECO-i SYSTEM 4. Mini ECO-i Alarm Codes Trouble Diagnosis P16 alarm Alarm code Alarm meaning Inverter compressor overcurrent alarm Alarm conditions This alarm occurs when current trouble or current detection trouble occurs at an inverter frequency of less than 80 Hz after start (when trouble judgment current is detected in the primary or secondary current, or when an instantaneous secondary current of 48 A or higher is detected).
Page 91 Mini ECO-i SYSTEM 4. Mini ECO-i Alarm Codes Trouble Diagnosis P29 alarm Alarm code Alarm meaning Inverter compressor missing phase or lock alarm Alarm conditions This alarm may occur at start, and occurs when missing phase or lock is detected, and when a DCCT failure occurs.
Page 92: Inspection Of Parts (Outdoor Unit)
Mini ECO-i SYSTEM 5. Inspection of Parts (Outdoor Unit) Trouble Diagnosis Electronic control valve (MOV1) MOV1: Measure the voltage between plug pin 5 and pins 1 through 4 at the CN41 connector (6P, white) on the outdoor unit control PCB. (Because of the pulse output, a simplified measurement method is used. Set the tester to the 12 V range;...
Page 93 SANYO Electric Co., Ltd. 200812E DC Printed in Japan...

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