Hitachi UTOPIA R32 Series User Manual

62
PMEN0654 rev.0 - 12/2023
14
MAIN ALARM CODES
TROUBLESHOOTING
Code Category Content of Abnormality Leading Cause
3A
Outdoor Unit
Abnormality of outdoor unit
capacity
Outdoor unit capacity > permied maximum
3b
Incorrect seng of outdoor unit
models combinaon or voltage
Incorrect seng of main and sub units(s) combinaon or
voltage
3d
Abnormal communicaon
between main unit and sub
unit(s)
Incorrect wiring, disconnect wire, breaking wire, PCB
failure
3E
Abnormal combinaon between
inverter PCB and outdoor PCB
Incorrect combinaon between inverter PCB and outdoor
PCB
43
Protecon
Device
Acvaon of pressure rao
decrease protecon
Defecve compression (failure of compressor or inverter,
loose power supply Connecon)
44
Acvaon of low pressure
increase protecon
Overload at cooling, high temperature at heang,
expansion valve locking at open posion (loose
connector)
45
Acvaon of high pressure
increase protecon
Overload operaon (heat exchanger clogging, short
circuit of airow), pipe clogging, excessive refrigerant,
inert gas mixing
47
Acvaon of low pressure
decrease protecon
Insucient refrigerant, piping clogging, expansion valve
locking at close posion (loosen connector)
48
Acvaon of inverter
overcurrent protecon
Overload operaon, compressor failure
49 Outdoor Unit
Shortage of energy transfer at
indoor unit and outdoor unit side
Shortage of refrigerant due to gas leakage
51 Sensor
Abnormal inverter current
sensor
Current sensor failure
53
Inverter
Inverter error signal detecon
Driver IC error signal detecon (protecon for
overcurrent, voltage decrease, short circuit),
instantaneous overcurrent
54
Abnormality of inverter n
temperature
Abnormal inverter n thermistor, heat exchanger
clogging, fan motor failure
55 Inverter failure Inverter PCB Failure
57
Fan Controller
Acvaon of fan controller
protecon
Driver ic error signal detecon (protecon for
overcurrent, voltage decrease, short circuit),
instantaneous overcurrent
5A
Abnormality of fan controller n
temperature
Fin thermistor failure, heat exchanger clogging, fan motor
failure
5b
Acvaon of overcurrent
protecon
Fan motor failure
5C
Abnormality of fan controller
sensor
Failure of current sensor (instantaneous overcurrent,
increase of n temperature, voltage decrease, grand
fault, step-out)
A1 External Input
Detecon of external
abnormality
Input signal by external abnormality detecon seng

Hitachi UTOPIA R32 Series Specifications

General

Brand	Hitachi
Model	UTOPIA R32 Series
Category	Air Conditioner
Language	English