Hitachi RAS-(3-6)HVNC1(E) - Page 232

8 Troubleshooting
218
SMGB0087 rev.0 - 12/2013
Code
number
Category Type of abnormality Main cause
31
System
Incorrect capacity setting or combined capacity
between outdoor and indoor units
Incorrect Capacity Code Setting, Excessive or Insuf-
cient Indoor Unit Total Capacity Code
32
Incorrect setting signal from another Indoor Unit
in same system (RPK only)
Abnormality of anoher Indoor Unit in the same Refrig-
erant Cycle (Failure of Power Source, Abnormality of
PCB)
35 Incorrect indoor unit number setting
Duplication of indoor unit number , number of indoor
units over specications.
36 Incorrect of Indoor Unit Combination.
"Indoor Unit is Designed for Other Refrigerant (R22
or R407C)."
38
Abnormality of picking up circuit for protection
(Outdoor unit)
Failure of indoor unit PCB, incorrect wiring, connection
to PCB in indoor unit.
41
Pressure
Cooling overload (possible activation of high
pressure device)
OU pipe thermistor temp. is higher than 55 ºC and the
compressor top temperature is higher than 95 ºC, OU
protection device is activated.
42
Heating overload (high-pressure device may be
activated)
If IU freeze protection thermistor temperature is higher
than 55 ºC and compressor top temperature is higher
than 95 ºC, OU protection device is activated.
43
Activation of the safety device from compression
ratio decrease
Abnormal compress (Compressor, Inverter damage)
44
Activation of the safety device from excessively
high suction pressure
Overload during cooling, high temperature with heat-
ing, loked expansion valve
45
Protection
Device
Activation of the safety device from excessively
high discharge pressure
Overload (obstruction of HEX, short circuit) mixture of
inert gas, Excessive Refrigerant.
47
Activation of the safety device from excessively
low suction pressure (protection from vacuum
operation)
Shortage or leakage of refrigerant, piping clogging,
expansion valve close-locked, fan motor locked.
48 Activation of overcurrent protection
Overload, overcurrent. Failure of DIP IPM, IPM or
PCB2, heat exchanger clogged, locked compressor.
EVI/EVO failure.
51
Inverter
Abnormal operatiion of the current sensor
Incorrect wiring of current sensor. Failure of control
PCB, DIP IPM, IPM or PCB2.
53 Inverter n temperature increase
Inverter module (IPM, DIP-IPM) and PCB2abnormal-
ity. Failure of compressor, clogging of heat exchanger.
54 Abnormality of inverter n temperature Heat Exchanger Clogging. Fan Motor Failure
55 Abnormality of inverter module Failure of DIP-IPM, IPM or PCB2.
57 Outdoor fan Fan Motor abnormality
Disconnected wire of incorrect wiring between control
PCB and inverter PCB. Incorrect wiring or fan motor
abnormality.
EE Compressor Compressor protection
"Compressor failure. This alarm code appears when
the following
alarms 02, 07, 08, 45, 47 occur three times within 6
hours."
b0
IU model set-
ting
Incorrect setting of unit model
No setting of unit capacity or incorrect setting of unit
capacity
b1
Number setting
Incorrect setting address or refrigerant cycle
Over 64 indoor units setting by number or indoor unit
address.
b5
Incorrect setting of indoor unit number for H-
LINK type
The number of indoor units connected to the H-Link II
of one system is 17 or higher