Method of self-diagnostics
If the indoor unit operation lamp is flashing every 0.5 seconds, follow the procedure below to perform detailed trouble diagnostics.
PROCEDURE
If the indoor unit operation lamp is flashing every 0.5 seconds, follow the procedure below to perform detailed trouble diagnostics.
PROCEDURE
1 Turn the power switch ON.
2 Move the operation selector on the remote control receiver to OFF (self-diagnostics).
3 If there is a sensor failure or a protective function has activated, self-diagnostics lamps 1, 2, and 3 will illuminate in the following pattern: 5 seconds flashing (illuminated) + 2 seconds OFF. (Buzzer sounds once while lamps are OFF.)
Note: If there is no trouble, then self-diagnostics lamps 1, 2, and 3 do not illuminate, and the buzzer does not sound.
4 Diagnostics is completed when the buzzer sounds 3 beeps.
5 After inspection or repair is completed, be sure to move the operation switch on the indoor unit main body to the DEMO. position, turn the power ON, and erase the diagnostics contents. Then move the operation selector on the remote control. receiver to the OFF position and check that the diagnostics contents have been erased before using the unit.
2 Move the operation selector on the remote control receiver to OFF (self-diagnostics).
3 If there is a sensor failure or a protective function has activated, self-diagnostics lamps 1, 2, and 3 will illuminate in the following pattern: 5 seconds flashing (illuminated) + 2 seconds OFF. (Buzzer sounds once while lamps are OFF.)
Note: If there is no trouble, then self-diagnostics lamps 1, 2, and 3 do not illuminate, and the buzzer does not sound.
4 Diagnostics is completed when the buzzer sounds 3 beeps.
5 After inspection or repair is completed, be sure to move the operation switch on the indoor unit main body to the DEMO. position, turn the power ON, and erase the diagnostics contents. Then move the operation selector on the remote control. receiver to the OFF position and check that the diagnostics contents have been erased before using the unit.
Error codes and Causes
S01,S02,S03
# Room temperature sensor
failure.
# Indoor heat exchanger sensor
failure.
# Humidity sensor failure.
1. Sensor open circuit or short
circuit.
2. Contact failure at connector or open circuit at terminal crimping location (short-circuit detection only for the humidity sensor)
3. Indoor/outdoor circuit board failure.
2. Contact failure at connector or open circuit at terminal crimping location (short-circuit detection only for the humidity sensor)
3. Indoor/outdoor circuit board failure.
S04,S05,S06
# Outdoor heat exchanger sensor
failure.
# Outdoor narrow tubing sensor failure.
# Outdoor narrow tubing sensor failure.
# Outdoor air temperature sensor
failure.
# Outdoor wide tubing sensor failure.
# Outdoor wide tubing sensor failure.
# Compressor temperature sensor
failure.
# SH sensor failure.
# SH sensor failure.
1. Sensor open circuit or short
circuit.
2. Contact failure at connector or open circuit at terminal crimping location.
3. Outdoor circuit board failure.
2. Contact failure at connector or open circuit at terminal crimping location.
3. Outdoor circuit board failure.
E02
# HIC circuit failure.
# Power Tr circuit failure.
# Power Tr circuit failure.
1. HIC or power Tr failure.
2. Outdoor fan does not turn.
3. Instantaneous power outage.
4. Service valve not opened.
4. Service valve not opened.
5. Outdoor fan blocked.
6. Continuous overload operation.
7. Compressor failure.
7. Compressor failure.
8. Outdoor circuit board failure.
E04
# Peak current cut-off.
1. Instantaneous power outage.
2. HIC or power Tr failure.
3. Outdoor circuit board failure.
3. Outdoor circuit board failure.
E05
# PAM circuit failure.
# Active circuit failure.
# Active circuit failure.
1. Outdoor circuit board failure.
2. Outdoor power supply voltage failure.
E06
# Compressor discharge overheat
prevention.
1. Electric expansion valve
failure.
2. Capillaries blocked.
3. No gas.
4. Continuous overload operation.
5. Outdoor fan does not turn.
6. Outdoor circuit board failure.
E12
# Outdoor system communications
failure.
# Outdoor Hi-pressure SW, OLR operation.
# Outdoor power supply open phase, outdoor coil freezing.
# Outdoor Hi-pressure SW, OLR operation.
# Outdoor power supply open phase, outdoor coil freezing.
1. Miswiring.
2. Blown fuse.
3. Power relay failure.
4. Open phase.
5. Outdoor circuit board failure.
5. Outdoor circuit board failure.
6. Compressor failure.
Test Run
(1) Switch on the power source.
(2) Set the remote control receiver of the indoor unit to the TEST position. This starts the fans, producing uncooled forced air with the OPR lamp lit.
(3) After 3 minutes, the system shifts into cooling operation, and cool air will start to be felt. Cooling operation with the switch at the TEST position is unaffected by the room temperature.
(4) After stopping the test run, turn the remote control receiver of the indoor unit to the OFF position once, then move it to the ON position.
(5) Press the ON/OFF button on the remote control unit to stop the air conditioner.
(1) Switch on the power source.
(2) Set the remote control receiver of the indoor unit to the TEST position. This starts the fans, producing uncooled forced air with the OPR lamp lit.
(3) After 3 minutes, the system shifts into cooling operation, and cool air will start to be felt. Cooling operation with the switch at the TEST position is unaffected by the room temperature.
(4) After stopping the test run, turn the remote control receiver of the indoor unit to the OFF position once, then move it to the ON position.
(5) Press the ON/OFF button on the remote control unit to stop the air conditioner.
