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TROUBLESHOOTING
“RUN” light flickers and “ALARM” is indicated on the remote control switch.
The unit No., alarm code and the unit code is alternately indicated on the set temperature section,
and the unit No. and alarm code are indicated on the display of the outdoor unit PCB.
This alarm code is indicated when the temperature of the internal thermostat () for the outdoor fan
motor is higher than 130°C.
Alarm
Code
Activation of Protection Device for Outdoor Fan Motor
Yes
Yes
Replace the motor.
Correct connection.
Replace the connector.
If the voltage is over
264V or under 187V,
check the power source
and check the wiring
around the outdoor unit
PCB.
No No
No
Yes
Yes
Does the outdoor
fan run?
Is continuity present after
temperature has dropped to
under 83
o
C at the internal
thermostat of the outdoor
fan motor?
Replace the outdoor fan motor
if faulty. Or check outdoor
temperature. If it is unusual,
take suitable action to reduce it.
No
<Common>
Is 220V or 240V applied across
R2 and S2 on PCB2 (AC Chopper)?
Is 220V or 240V applied across
R2 and N of TB1?
Is connection bad at the
connector PCN14 on PCB1 or
fan motor connectors (CN1, CN2,
CN50, CN51, CN52)?
Check Item
5 to 20HP ITO1, 2 380-415/380V, 220V 50/60Hz
24, 30HP ITO1, 2, 3 380-415V 50Hz, 380V 60Hz
ITO1, 3 220V 60Hz
HP Mark Power Supply
Cause
Check Item
Action
(Turn OFF Main Switch)
Phenomenon
Activation
of Internal
Thermostat for
Outdoor Unit
Fan Motor
Measure resistance
by tester.
Check continuity after
fan motor temperature
decreases to room temp.
Faulty
Internal
Thermostat
Fault
Replace fan motor if no
continuity of internal
thermostat under 83
o
C.
Correct looseness.
Replace connectors.
Insufficient
Contacting
Check connections. Repair connections.
Incorrect
Connection
Measure coil
resistance and
insulation resistance.
Replace motor if faulty.
Faulty Outdoor Unit
Fan Motor
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