ERROR
CONTENTS
ERROR CAUSE
COUNTERMEASURE
Discharge
temperature 3
error
1. Check the gas leak and check
additional refrigerant amount and
recharge suitable refrigerant.
1. Gas leak or lack of refrigerant.
1. Error occurrence condition
Discharge temperature 3
rises 130 C or greater for
40 minutes and compressor
3 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 3 is reset.
2) Discharge temperature
protector is not operated for
40 minutes or longer.
23
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 THD3 loosens or
comes off and check the resistance of
THD3. 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 faulty, replace
solenoid valve.
Cooling operation
(1) Outdoor unit solenoid valve SV1
(2) RB unit solenoid valves 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 THD3 is faulty.
4. Electronic expansion valve
operation is faulty.
5. Solenoid valve operation is
faulty.
ERROR
CODE
05-24
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