Hitachi PC-ARFP1E Installation And Operation Manual page 82

OTHER INDICATIONS
Code
Category
number
Abnormality of the compressor
20
thermistor
21 Abnormality of high pressure sensor
22 Abnormality of outdoor air thermistor
Sensor on Abnormality of discharge gas thermistor
23
outdoor unit on top of compressor
Abnormality of heat exchanger liquid
24
pipe thermistor
Abnormality of heat exchanger gas
25
pipe thermistor
29 Abnormality of low pressure sensor
Incorrect DIP switch settings of outdoor
30
unit for CH-Box
Incorrect capacity setting of outdoor
31
unit and indoor unit
35 System Incorrect indoor unit number setting
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
models incorrectly set
Outdoor unit
Abnormal transmission between the
3d
main unit and the secondary unit(s)
Abnormal combination between
3E
Inverter PCB and Outdoor PCB
Cooling overload (possible activation of
41
high pressure device)
Heating overload (possible activation of
42
high pressure device)
Activation of the protection device from
43
compression ratio decrease
Protection
Activation of the protection device from
44
device
excessively high suction pressure
Activation of the protection device from
45
excessively high discharge pressure
Activation of the protection device
47 from excessively low suction pressure
(protection from vacuum operation)
Abnormality of current sensor for
48
inverter
Abnormality of current sensor for
51 Sensor
Inverter
74 PMML0496 rev.1 - 12/2020
Abnormality
Incorrect Wiring, Disconnecting Wiring,Breaking Wire, Short Circuit
Connection of CH-Box to heat pump system, disconnection of CH-Box to
heat recover system
Incorrect capacity setting of outdoor unit and indoor unit, excessive or
insufficient indoor unit total capacity code
Duplication of indoor unit number in same refrigerant cycle number
Indoor unit is designed for R22
Failure of protection detecting device (incorrect wiring of outdoor PCB)
Overcurrent, blown fuse, current sensor fault, instant power failure, voltage
drop, abnormal power supply
Outdoor unit capacity > Permitted maximum
Voltage or combination of secondary and main units incorrectly set
Incorrect wiring, disconnected wiring, broken cable, PCB fault
Incorrect combination between Inverter PCB and outdoor PCB
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 compression (Compressor, Inverter damage)
Overload during cooling, high temperature with heating, locked expansion
valve
Overload (obstruction of heat exchanger, short circuit) mixture of inert gas
Shortage or leakage of refrigerant, piping clogging, expansion valve close-
locked, fan motor locked
Failure of DIP-IPM, heat exchanger clogged, locked compressor, EVI/EVO
failure or overcharge
Current sensor failure
Cause