Alarms For Lcd - Hitachi YUTAKI RWM-2R1E Installation & Operation Manual

TROUBLESHOOTING
Code
Category
number
7 Decrease in discharge gas superheat
Cycle
Excessively high discharge gas temperature at
8
the top of compressor
Activation of the protection device for the indoor
19 Fan motor
fan motor
Thermistor for discharge gas temperature
20
(THM9)
21 High pressure sensor
Outdoor unit
Thermistor for outdoor ambient temperature
sensor
22
(THM7)
24 Thermistor for evaporating temperature (THM8)
Incorrect capacity setting or combined capacity
31
between outdoor and indoor units
35 Incorrect indoor unit number setting
System
36 Incorrect of Indoor Unit Combination.
Abnormality of picking up circuit for protection
38
(Outdoor unit)
Activation of the safety device from excessively
45
high discharge pressure
Activation of the safety device from excessively
Protection
47 low suction pressure (protection from vacuum
device
operation)
48 Activation of overcurrent protection
51 Abnormal operation of the current sensor
53 Inverter fin temperature increase
Inverter
54 Abnormality of inverter fin temperature
55 Abnormality of inverter module
EE Compressor Compressor protection
Indoor unit
b0 Incorrect setting of unit model
model setting
b1 Incorrect setting address or refrigerant cycle
Number setting
Incorrect setting of indoor unit number for
b5
H-LINK type

12.1.4 Alarms for LCD

Retry
Alarm YUTAKI YUTAKI
Stop
Code S/SC
Code
202 (o)
203 (o)
204 (o)
205 (o)
318 PMML0575 rev.2 - 03/2022
Type of abnormality
YUTAKI
Origin
S80 M
(o) (o) LCD
(o) (o) LCD
(o) (o) LCD
(o) (o) LCD
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.
Detail of Abnormality
Wrong settings of PC-ARFH1E
Slave PC-ARFH1E stops answering
to Master PC-ARFH1E
Indoor unit stops answering to
Master PC-ARFH1E
Central Alarm, no Central message
Main cause
Main Factors
Loose, disconnected, broken or
short-circuited connector
Loose, disconnected, broken or
short-circuited connector
Loose, disconnected, broken or
short-circuited connector