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Monobloc Outdoor Unit
Check Code
Operational Cause
33
Inverter high pressure
228
release failure
Exchanger freeze protection
-
50
on water temperature (in
cooling)
Exchanger freeze protection
-
51
on refrigerant temperature
(in cooling)
243
60
Reversing valve protection
246
61
Fan error
62
Compressor inverter short
250
circuit protection
Compressor motor position
253
63
detection error
64
129
Compressor breakdown
65
130
Compressor lock
70
Compressor thermal switch
132
release failure
Determination and action
Automatic
Unit Status
Reset
Alarm reset by resetting the power supply to the Monobloc unit. Error
detected when discharge pressure exceeds HP switch limit pressure.
1. Check of outdoor fan operation.
Compressor
O
2. Check motor error of outdoor fan.
stop
3. Check clogging of outdoor PMV.
4. Check clogging of heat exchanger.
5. Check for re-cycling of air around air heat exchanger
Automatic reset when EWT or LWT is ≥4°C. Alarm is activated during cooling
mode or a defrost operation and when EWT or LWT < 4°C
Cooler heater is energized while the alarm is active. Water pump is forced to
run.
Stop
X
Alarm reset by resetting the power supply to the Monobloc unit. Energized
Cooler Heater while alarm is active.
Force pump to run until alarm reset kind becomes manual.
Error becomes definite after retrying operation more than 12 occurrences
Stop
O
within a 2 hours period
Alarm reset by resetting the power supply to the Monobloc unit. Error
becomes definite after retrying operation for 4 times.
1. Check operation of 4-way valve.
Compressor
O
2. Check air heat exchanger (TE), suction temp. sensor (TS).
stop
3. Check BPHE sensor (TR).
4. Check 4-way valve coil.
5. Check PMV (Pulse Motor Valve).
Alarm reset by resetting the power supply to the Monobloc unit. Error
becomes definite after retrying operation for 8 times.Error detected in either
of the following condition;
1) Fan motor lock
Compressor
O
2) Fan motor IPM over currentat start up
stop
3) Fan IPDU DCvoltage abnormal
Check:
1. Check lock of fan motor.
2. Check power supply voltage between L2 and N.
Alarm reset by resetting the power supply to the Monobloc unit. Error
becomes definite after retrying operation for 8 times. Error detected in either
of the following condition;
Compressor
O
1) Compressor IPM short circuit
stop
detection at start up
2) Compressor IPM short circuit
detection during coil heating
Alarm reset by resetting the power supply to the Monobloc unit. Error
Compressor
becomes definite after retrying operation for 8 times. Error detected when
O
stop
offset voltage of motor current sensor is abnormal before compressor start
up.
Alarm reset by resetting the power supply to the Monobloc unit. Error
becomes definite after retrying operation for 8 times. Error detected in either
of the following
condition;
Compressor
1) Compressor over current
O
stop
2) Compressor IPM short circuit
3) Compressor motor control failure
Check:
1. Check power supply voltage.
2. Overload operation of refrigerating cycle
Alarm reset by resetting the power supply to the Monobloc unit. Error
becomes definite after retrying operation for 8 times. Error detected in either
of the following condition;
Compressor
1) Compressor motor lock
O
stop
2) Compressor motor IPM over current at start up
Check:
1. Trouble of compressor (Lock, etc.): Replace compressor.
2. Wiring error of compressor (Open phase)
Alarm reset by resetting the power supply to the Monobloc unit. Error
becomes definite after retrying operation for 10 times.
Compressor
1. Check case thermostat and connector.
O
stop
2. Check gas leak, recharge
3. Check PMV (Pulse Motor Valve).
4. Check broken pipe.
76
1.
Check water flow rate
2.
Check water pressure drop
3.
Check EWT sensor
4.
Check LWT sensor
1.
Check TR, TD, TS & BP sensors
2.
Check PMV is operating correctly
3.
Check refrigerant circuit for leaks
4.
Check refrigerant pipes are not damaged
Service Manual
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