ERROR
CONTENTS
ERROR CAUSE
COUNTERMEASURE
Discharge
temperature 1
error
1. Check the gas leak and additional
refrigerant amount, and recharge
suitable refrigerant.
1. Gas leak or lack of refrigerant.
1. Error occurrence condition
Discharge temperature 1
rises to 130 C or higher for
40 minutes and compressor
1 is stopped twice or more.
2. Relevant operation
Error is displayed on LED of
outdoor unit and output to
communication bus line.
3. Clearance
When all the following
conditions are satisfied:
1) Discharge temperature
protector 1 reset.
2) Discharge temperature
protector is not operated for
40 minutes or longer.
21
2. Check outdoor fan motor operation.
Remove the obstruction in wind path.
If fan motor is faulty, replace motor.
3. Check if the wiring of discharge
temperature sensor THD1 loosens or
comes off and check the resistance
THD1. If it's abnormal, replace sensor.
4. Check operation and coil resistance
of following electronic expansion
valve. If it's abnormal, replace
electronic expansion valve.
Coil resistance measurement points.
Red-white, red-orange, brown-yellow,
brown-blue.
(1) Outdoor unit electronic expansion
valve EEV1 and EEV2 Coil
resistance: 192 +/-19 ohms.
(2) Indoor units electronic expansion
valve EEV Coil resistance:
150 +/-50 ohms.
5. Check operation of following solenoid
valves. If operation is faulty, replace
solenoid valve.
Cooling operation.
(1) Outdoor unit solenoid valve SV1.
(2) RB unit solenoid valves SVB and
SVS.
Heating operation.
(3) Outdoor units solenoid valves SV1,
SV7, and SV8.
(4) RB unit solenoid valve SVD.
Heat recovery operation (1), (2),
(3), (4).
2. Outdoor fan motor is faulty.
3. Discharge temperature
sensor THD1 is faulty.
4. Electronic expansion valve
operation is faulty.
5. Solenoid valve operation is
faulty.
ERROR
CODE
05-22
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