Hitachi 3HRNM1Q Installation & Maintenance Manual page 32

Code
Category
No.
01 Indoor Unit Activating of Protection Device
Activating of Protection Device
02 Outdoor Unit
(Except Alarm Code 41 and 42)
03
Abnormality between Indoor and Outdoor
Transmission
04
Abnormality between Inverter and Control PCB
Supply Abnormality of Power Supply Phases
05
Phases (for 220V/60Hz Unit Only)
Voltage Drop by Excessively Low or High
06 Voltage Drop
Voltage to Outdoor Unit
07 Decrease of Discharge Gas Superheat
Cycle
08 Increase of Discharge Gas Temperature
11 Inlet Air Thermistor
12 Outlet Air Thermistor
Sensor on
13 Freeze Protection Thermistor
Indoor Unit
14 Gas Piping Thermistor
19 Tripping of Protection Device
20 Compressor Thermistor
Sensor on
22 Outdoor Air Thermistor
Outdoor Unit
24 Evaporating Thermistor
31 Incorrect Capacity of Outdoor and Indoor Unit
System
35 Incorrect Indoor Unit No. Setting
38 Abnormality of Protective Circuit in outdoor Unit Failure of Protection detecting Circuit
Overload cooling
41
(Possibility of high pressure device activation.)
Overload heating
42 Pressure
(Possibility of high pressure device activation.)
Activation of Low Pressure Decrease
47
Protection Device
51 Abnormality of Current Sensor for Inverter
52 Overcurrent Protection Activation
53 Protection Activation of IPM or PCB2
Inverter
54 Inverter Fin Temperature Increase
55 IPM or PCB2 Abnormality
57 Outdoor Fan Fan Motor Abnormality
Thermistor of Inverter Fin Abnormality
59 Inverter
(for Inverter Fin Temp.)
Indoor Unit
b1 Incorrect Unit No. Setting
No. Setting
EE Compressor Compressor Protection Alarm
Table 7.3 Alarm Code (RAS-3HRNM1(Q))
Content of Abnormality
25
Leading Cause
High Water Level in Drain Pan,
Activated Float Switch.
Activated High Pressure Switch.
Locked Motor in Cooling Operation.
Abnormality of Power Supply Phase
Incorrect Wiring. Loose Terminals,
Disconnected wire, Tripping of Fuse.
Failure in Transmission of PCB for Inverter.
Abnormal Waveform of one or more the Supply
Phases (Ex. Distortion of the Voltage Signal).
Voltage Drop of Power Supply
Insufficient Capacity of Power Supply Wiring.
Discharge Gas SUPERHEAT less than
10 deg. is maintained for one hour.
Temperature of the top of Compressor: Td
o
Td > 127 C(Cooling), Td > 120
over 10 minutes, or Td > 140
Failure of Thermistor, Loose Terminal,
Disconnected Wire.
Activated Internal Thermo of Fan Motor.
Failure of Thermistor, Loose Terminal,
Disconnected Wire.
Locked Motor in Heating Operation.
Incorrect Setting of Capacity Combination or
Incorrect O.U. Capacity Setting.
Duplication of Indoor Unit No.
O.U. Pipe Thermistor Temp. is Higher than 55
and the Comp. Top Temp. is Higher than 95
when O.U. Protection Device is activated.
I.U. Freeze Protection Thermistor Temp. is Higher
o
than 55 C and the Comp. Top Temp. is Higher than
o
95 C when O.U. Protection Device is activated.
Stoppage by Excessively Decrease of evaporating
o
Temperature ( Te < -35 C) is activated 3 times in
one hour, Locked Motor in Heating Operation.
Failure of Control PCB1, IPM or PCB2
Failure of IPM or PCB2, Clogging of Heat Exchanger.
IPM or PCB2 Abnormality
Failure of Compressor, clogging of Heat Exchanger.
Abnormal Inverter Fin Thermistor,
Clogging of Heat Exchanger
Abnormal Outdoor Fan
Failure of IPM or PCB2
Disconnected wire or Incorrect wiring between
Control PCB and Inverter PCB.
Incorrect Wiring or Fan Motor Abnormality
Loose Connector, Disconnected Wire,
Short Circuit
Over 64 I.U. Setting by Ref. No. or I.U. Address.
Failure of Compressor.
o
C(Heating)
o
C over 5 seconds.
o
C
o
C