Sanyo Air Conditioner Error Codes

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	HIC circuit failure Power Tr (transistor) circuit failure
E03	Outdoor unit external ROM (OTP data) failure
E04	Peak current cut Off
E05	PAM circuit failure Active circuit failure
E06	Compressor discharge overheat prevention activated
E07	Indoor fan operating failure
E08	4-way valve switching failure Indoor zero-cross failure
E09	No-reirigerant protection
E10	DC compressor drive circuit failure
E11	Outdoor fan operating failure
E12	Outdoor system communications failure OLR operation Outdoor power supply open phase Outdoor coil freezing
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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