Hitachi PC-ARFP1E Installations- Und Betriebshandbuch Seite 49

OTHER INDICATIONS
Code
Category
number
11 Air inlet thermistor
12 Air outlet thermistor
Sensor on
indoor unit
13 Freeze protection thermistor
14 Gas piping thermistor
Abnormal operation of thermistor for
15 Econofresh
fresh outdoor air
16 Remote thermistor
Sensor on
17 Thermistor of RCS
indoor unit
Activation of the protection device for
19
the indoor fan motor
20 Compressor thermistor
21 High pressure sensor
Thermistor for outdoor ambient
22
temperature (THM7)
Sensor on Thermistor for discharge gas
23
outdoor unit temperature (THM9)
Thermistor for evaporating temperature
24
(THM8)
25 Heat exchanger gas pipe thermistor
29 Low pressure sensor
Incorrect capacity setting or combined
31 capacity between outdoor and indoor
units
35 Incorrect indoor unit number setting
System
36 Incorrect indoor unit combination
Abnormality of picking up circuit for
38
protection (Outdoor unit)
Abnormal operation current in constant
39 Compressor
speed compressor
3A Abnormal outdoor unit capacity
Voltage or combination of outdoor unit
3b
Outdoor unit
models incorrectly set
Abnormal transmission between the
3d
main unit and the secondary unit(s)
Cooling overload (possible activation of
41
high pressure device)
Heating overload (possible activation of
42
high pressure device)
Activation of the safety device from
43
compression ratio decrease
Pressure
Activation of the safety device from
44
excessively high suction pressure
Activation of the safety device from
45
excessively high discharge pressure
Activation of the safety device from
47 excessively low suction pressure
(protection from vacuum operation)
41 PMML0404A rev.1.1 - 06/2022
Abnormality
Failure of thermistor, sensor, connection.
Failure of thermistor
Failure of thermistor
Failure of fan motor
Failure of thermistor, sensor, connection.
Incorrect wiring, disconnected wiring, broken cable, short circuit.
Failure of thermistor, sensor, connection.
Incorrect wiring, disconnected wiring, broken cable, short circuit.
Incorrect wiring, disconnected wiring, wire breaking, short circuit, fan motor
locking at heating operation.
Incorrect wiring, disconnected wiring, broken cable, short circuit
Incorrect setting of the capacity code.
Duplication of indoor unit number , number of indoor units over
specifications.
R22 indoor unit
Failure of indoor unit PCB, incorrect wiring, connection to PCB in indoor unit.
Overcurrent, blown fuse, current sensor fault, instant power failure, voltage
drop, abnormal power supply
Outdoor unit capacity >54HP
Voltage or combination of secondary and main units incorrectly set
Incorrect wiring, disconnected wiring, broken cable, PCB fault
If the outdoor unit pipe thermistor temperature is higher than 55ºC and the
compressor top temperature is higher than 95ºC, outdoor unit pretection
device is activated.
If the indoor unit freeze protection thermistor temperature is higher than
55ºC and the compressor top temperature is higher than 95ºC, outdoor unit
pretection device is activated
Abnormal compress (Compressor, Inverter damage)
Overload during cooling, high temperature with heating, loked expansion
valve
Overload (obstruction of HEX, short circuit) mixture of inert gas
Shortage or leakage of refrigerant, piping clogging, expansion valve close-
locked, fan motor locked.
Cause