Hitachi UTOPIA R32 Series User Manual

61
PMEN0654 rev.0 - 12/2023
14
MAIN ALARM CODES
TROUBLESHOOTING
Code Category Content of Abnormality Leading Cause
18
Indoor Fan
Motor
Abnormality of indoor fan
system
Abnormality of indoor fan motor (step-out), indoor fan
controller failure
19
Acvaon of protecon device
for indoor fan
Fan motor overheat, lockup
1A
Indoor Fan
Controller
Abnormality of fan controller n
temperature
Abnormality of n thermistor or fan controller, heat
exchanger clogging, abnormality of fan motor
1b
Acvaon of overcurrent
protecon
Abnormality of fan motor
1C Problem with current sensor Abnormality of fan controller current sensor
1d
Acvaon fan controller
protecon
Driver IC error signal detecon, instantaneous
overcurrent
1E
Abnormality of indoor fan
controller voltage
Indoor voltage decrease, insucient capacity of power
supply wiring
21
Sensor on
Outdoor Unit
Abnormality of high pressure
sensor
Incorrect wiring, disconnecng wiring, breaking wire,
short circuit
22
Abnormality of outdoor air
thermistor
23
Abnormality of discharge gas
thermistor on top of compressor
24
Abnormality of heat exchanger
liquid pipe thermistor
25
Abnormality of heat exchanger
gas pipe thermistor
29
Abnormality of low pressure
sensor
30
System
Incorrect DSW sengs of
outdoor unit for CH-Box
Connecon of CH-Box to heat pump system,
disconnecon of CH-Box to heat recover system
31
Incorrect capacity seng of
outdoor unit and indoor unit
Incorrect capacity seng of outdoor unit and indoor unit,
excessive or insucient indoor unit total capacity code
35
Incorrect seng of indoor unit
number
Duplicaon of indoor unit number in same refrigerant
cycle number
36
Incorrect of indoor unit
combinaon
Indoor unit is designed for R22
38
Abnormality of picking up circuit
for protecon in outdoor unit
Failure of protecon detecng device (incorrect wiring of
outdoor PCB)

Hitachi UTOPIA R32 Series Specifications

General

Brand	Hitachi
Model	UTOPIA R32 Series
Category	Air Conditioner
Language	English