Since the indications cover various units, the corresponding parts listed below may not be present in some models.
| Error Code | Diagnostics items |
|---|---|
| S01 | Room temperature sensor failure |
| S02 | Indoor heat exchanger sensor failure |
| S03 | Humidity sensor failure |
| S04 | Compressor temperature sensor failure |
| S05 | Outdoor heat exchanger sensor failure |
| S06 | Outdoor air temperature sensor failure |
| S07 | Outdoor electrical current detection faillure |
| E01 | lndoor/outdoor communications failure |
| E02 | |
| E03 | Outdoor unit external ROM (OTP data) failure |
| E04 | Peak current cut Off |
| E05 | |
| E06 | Compressor discharge overheat prevention activated |
| E07 | Indoor fan operating failure |
| E08 | |
| E09 | No-reirigerant protection |
| E10 | DC compressor drive circuit failure |
| E11 | Outdoor fan operating failure |
| E12 | |
| E13 | Freeze-prevention operation activated |
Sanyo Fault Codes and Possible Cause of Malfunction
| Error Codes | Possible Cause of Malfunction |
|---|---|
| E01 | serial comms error, mis-setting, RC is detecting error signal from IU, outdoor system address, indoor system address. |
| E02 | serial comms error, mis-setting, RC is detecting error signal from IU, error in transmitting serial comm signal |
| E03 | IU is detecting error signal from remote controller (and system controller) |
| E04 | IU is detecting error signalled from OU, error in receiving serial comms signal |
| E05 | IU is detecting error signalled from OU, error in transmitting serial comms signal |
| E06 | OU is detecting error signalled from IU, error in receiving serial comms signal (inc unit qty verification failure) |
| E07 | OU is detecting error signalled from IU, error in transmitting serial comms signal |
| E08 | improper setting of IU or RC,IU address is duplicated |
| E09 | improper setting of IU or RC, remote controller setting is duplicated |
| E10 | IU is detecting error signalled from signal option, error in transmitting serial comms signal |
| E11 | IU is detecting error signalled from signal option, error in receiving comms signal |
| E12 | IU is detecting error signalled from signal option, because auto address setting is in process in a different system. |
| E14 | setting error, main unit duplication in simultaneous-operation multi control (detected by outdoor unit) |
| E15 | automatic address setting failed, IU capacity too low |
| E16 | automatic address setting failed, IU capacity too high |
| E17 | an IU detected trouble in the signal from another IU, error in transmitting serial comms signal |
| E18 | an IU detected trouble in the signal from another IU, error in receiving serial comms signal |
| E20 | automatic address setting failed, no signal received from another IU |
| E24 | Auto address error, Main OU is detecting error signal from sub OU |
| E25 | Auto address error, of OU address setting |
| E26 | Auto address error, the number of connected main and sub OU do not correspond to the number set at the main OU PCB |
| E29 | auto address error, sub OU in receiving serial comm signal from main OU |
| F01 | thermistor fault, indoor coil temp. sensor (E1) |
| F02 | thermistor fault, indoor coil temp. sensor (E2) |
| F03 | thermistor fault, indoor coil temp. sensor (E3) |
| F04 | Outdoor thermistor open circuit, discharge TD1 |
| F05 | Outdoor thermistor open circuit, discharge TD2 |
| F06 | Outdoor thermistor open circuit, heat exchanger temperature C1 |
| F07 | Outdoor thermistor open circuit, heat exchanger temperature C2 |
| F08 | thermistor fault, outdoor air temp. sensor (air temp) |
| F10 | thermistor fault, indoor suction air (room) temp sensor (TA) |
| F11 | thermistor fault, indoor discharge air temp. sensor (BL) |
| F12 | Outdoor thermistor open circuit, intake temperature TS |
| F16 | thermistor fault, outdoor high pressure sensor |
| F17 | thermistor fault, outdoor unit low pressure sensor |
| F22 | thermistor fault, outdoor unit compressor 3 (constant speed) discharge temp sensor |
| F23 | thermistor fault, outdoor No. 2 coil gas temp (EXG2) |
| F24 | thermistor fault, outdoor No. 2 coil liquid temp. sensor (EXL2) |
| F25 | thermistor fault, outdoor unit heat exchanger 3 gas temp. sensor |
| F26 | thermistor fault, outdoor unit heat exchanger 3 liquid temp. sensor |
| F29 | indoor EEPROM error |
| F31 | outdoor EEPROM error |
| H01 | AC1 compressor protection, overload current was detected |
| H02 | AC1 compressor protection, lock current was detected |
| H03 | AC1 compressor protection, no current was detected when the compressor was ON (CT1 circuit failure) |
| H05 | the compressor discharge sensor has become disconnected (detected only for the AC1 compressor) |
| H06 | low pressure switch activated on AC1, AC2 compressor |
| H07 | protective device for compressor is activated, low oil level |
| H08 | protective device for compressor is activated, compressor no. 1 oil sensor fault (disconnection, etc) |
| H11 | AC2 compressor protection, overload current was detected |
| H12 | AC2 compressor protection, lock current was detected |
| H13 | AC2 compressor protection, no current was detected when the compressor was ON (CT2 circuit failure) |
| H15 | the AC2 compressor discharge sensor has become disconnected |
| H21 | outdoor protective device, overload current detected on compressor 3 (constant speed) |
| H22 | outdoor protective device, lock current detected on compressor 3 (constant speed) |
| H23 | outdoor protective device, no current detected when compressor 3 (constant speed) was on |
| H25 | outdoor protective device, discharge temp. sensor trouble, Compressor 3 (constant speed) |
| H27 | protective device for compressor is activated, compressor no. 2 oil sensor fault (disconnection, etc) |
| H28 | connection failure of oil detection sensor, compressor no 3 (contestant speed) |
| H31 | outdoor unit protection IPM trip (IPM current or temperature) HIC Alarm trouble |
| L02 | mis-setting error, IU/OU type mismatch |
| L03 | mis-setting error, main unit duplication in group control (detected by IU) |
| L04 | mis-setting error, OU address duplication (system address) |
| L05 | improper setting, there are 2 or more IU RC which have operation mode priority in refrigeration circuit. |
| L06 | improper setting, there are 2 or more IU RC which have operation mode priority in refrigeration circuit. |
| L07 | mis-setting error, group wiring connected for independent IU |
| L08 | mis-setting error, IU address not set or group not set |
| L09 | mis-setting error, IU capacity not set |
| L10 | mis-setting error, OU capacity not set or setting error |
| L11 | mis-setting error, miswiring in group control wiring |
| L13 | mis-setting error, IU type setting error |
| L17 | mis-match connection of outdoor units which have a different kind of refrigerant |
| L18 | 4-way valve operation failure |
| P01 | indoor fan protective thermostat |
| P02 | the AC compressor or AC1, AC2 compressor internal protection thermostat was activated: or low voltage was detected |
| P03 | discharge temperature trouble on outdoor |
| P04 | High pressure sensor operation on AC, AC1 or AC2 compressor |
| P05 | open phase detected, AC power trouble |
| P09 | ceiling panel connection failure |
| P10 | indoor float switch |
| P12 | indoor fan overload (check for packaging on new cass install) |
| P16 | compressor running failure resulting from missing phase in the compressor wiring etc |
| P17 | incorrect discharge temperature (comp no 2) |
| P22 | outdoor unit fan (missing phase in the HALL IC or other problem) causing the fan to lock |
| P26 | overcurrent at time of compressor runs more than 80hz (DCCT secondary current or ACCT primary current at a time other than when IPM has tripped |
| P29 | inverter for compressor is unusual (DC compressor does not operate) |
| P31 | a flexible control error occurred |
Sanyo Air Conditioner Troubleshooting
If your air conditioner does not work properly, first check the following points before requesting service. If it still does not work properly, contact your dealer or service center.
1-Trouble
Air conditioner does not run at all.
Possible Cause
1. Power failure.
2. Leakage breaker tripped.
3. Line voltage is too low.
4. ON/OFF operation button is OFF.
5. Batteries in remote control unit have run down.
Remedy
1. Restore power.
2. Contact service center.
3. Consult with electrician or dealer.
4. Press the button again.
5. Replace batteries.
2-Trouble
Compressor runs but soon stops
Possible Cause
1. Obstruction in front of condenser coil.
Remedy
1. Remove obstruction.
3-Trouble
Poor cooling performance.
Possible Cause
1. Dirty or clogged air filter.
2. Heat source (cooker, heater, or electrical appliance) or many people in room.
3. Doors and/or windows are open.
4. Obstacle near air intake or air discharge port.
5. Thermostat is set too high.
Remedy
1. Clean the air filter to improve the air flow.
2. Eliminate heat source if possible.
3. Shut them to keep the heat out.
4. Remove it to ensure good air flow.
5. Set the temperature lower.
4-Trouble
OPERATION lamp blinks and air conditioner does not operate.
Possible Cause
Trouble in system.
Remedy
Contact service center.
5-Trouble
Clicking sound is heard from the air conditioner.
Possible Cause
In heating or cooling operation, any plastic parts may expand or shrink due to a sudden temperature change. In this event, a clicking sound may occur.
Remedy
This is normal, and the sound will soon disappear.
6-Trouble
OPERATION lamp lights but outdoor unit will not run.
Possible Cause
The use of cellular phones near the air conditioner may cause disturbance to its normal operation.
Remedy
- Turn off the power then restart the air conditioner after a while.
- Consult your dealer.
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