Hitachi PC-ARFH1E Manual página 77

Alarm code Category
Activation of protection device
Outdoor unit
2
(high pressure cut)
Abnormal transmission between outdoor and indoor units
3
Transmission
Abnormal transmission between inverter PCB and RASC unit PCB
4
Power supply Reception of abnormal operation code for detection of power source phase
5
Voltage Excessively low voltage or excessively high voltage for the inverter
6
Decrease in discharge gas superheat
7
Cycle
Excessively high discharge gas temperature at the top of compressor
8
Fan motor Activation of the protection device for the indoor fan motor
19
Thermistor for discharge gas temperature (THM9)
20
High pressure sensor
21
Outdoor unit
Thermistor for outdoor ambient temperature (THM7)
22
sensor
Thermistor for evaporating temperature (THM8)
24
Incorrect capacity setting or combined capacity between outdoor and indoor units
31
Incorrect indoor unit number setting
35
System
Incorrect of Indoor Unit Combination.
36
Abnormality of picking up circuit for protection (Outdoor unit)
38
Activation of the safety device from excessively high discharge pressure
45
Activation of the safety device from excessively low suction pressure (protection
Protection
47
from vacuum operation)
device
Activation of overcurrent protection
48
Abnormal operation of the current sensor
51
Inverter fin temperature increase
53 Inverter
Abnormality of inverter fin temperature
54
Abnormality of inverter module
55
EE Compressor Compressor protection
Indoor unit
b0 Incorrect setting of unit model
model setting
b1 Incorrect setting address or refrigerant cycle
Number
setting
b5 Incorrect setting of indoor unit number for H-LINK type
PMEN0602 rev.0 - 05/2023
Type of abnormality
Activation of PSH, locked motor, abnormal operation in the power supply phase.
Failure of fan motor, drain discharge, PCB, relay, float switch activated.
(Pipe clogging, excessive refrigerant, innert gas mixing, fan motor locking at cooling operation)
Incorrect wiring. Loose terminals, Failure of PCB. Tripping of fuse. Power supply OFF.
Transmission failure between inverter PCBs. (Loose Connector, Wire Breaking, Blowout of Fuse).
Power source with abnormal wave pattern. Main power supply phase is reversely connected or one phase is not connected.
Voltage drop in power supply. Incorrect wiring or insufficient capacity of power supply wiring.
Excessive Refrigerant Charge, Failure of Thermistor, Incorrect Wiring, Incorrect Piping Connection, Expansion Valve Locking at Opened
Position (Disconnected Connector).
Insufficient refrigerant charge, refrigerant leakage. Expansion valve closed or clogged.
Failure of fan motor.
Incorrect wiring, disconnected wiring, broken cable, short circuit.
Incorrect Wiring, Disconnected Wiring, Wire Breaking, Short Circuit, Fan Motor Locking at Heating Operation.
Incorrect Capacity Code Setting, Excessive or Insufficient Indoor Unit Total Capacity Code.
Duplication of indoor unit number, number of indoor units over specifications.
Failure of indoor unit PCB, incorrect wiring, connection to PCB in indoor unit.
Overload (obstruction of HEX, short circuit) mixture of inert gas, Excessive Refrigerant.
Shortage or leakage of refrigerant, piping clogging, expansion valve close-locked, fan motor locked.
Overload, overcurrent. Failure of Inverter PCB, heat exchanger clogged, locked compressor. EVI/EVO failure.
Incorrect wiring of current sensor. Failure of control PCB or Inverter PCB.
Inverter module (IPM, DIP-IPM) and Inverter PCB abnormality. Failure of compressor, clogging of heat exchanger.
Heat Exchanger Clogging. Fan Motor Failure.
Failure of DIP-IPM, IPM or Inverter PCB.
"Compressor failure. This alarm code appears when the following alarms 02, 07, 08, 45, 47 occur three times within 6 hours."
No setting of unit capacity or incorrect setting of unit capacity.
Over 64 indoor units setting by number or indoor unit address.
The number of indoor units connected to the H-LINK II of one system is 17 or higher.
Main cause
2
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