Hitachi RAS-8.0HNBRMQ1 - Page 72

65
20
Sensor on
Outdoor Unit
Abnormality of Discharge Gas
Thermistor
Incorrect Wiring, Disconnected Wiring, Broken Wire Short Circuit
21 Abnormality of High Pressure Sensor
22 Abnormality of Outdoor Air Thermistor
24
Abnormality of Heat Exchanger
Piping Thermistor
29 Abnormality of Low Pressure Sensor
31
Incorrect Capacity Setting of Outdoor
Unit and Indoor Unit
Incorrect Capacity Code Setting of Combination Excessive or
Insufcient Indoor Unit Total Capacity Code
35 Incorrect Setting of Indoor Unit No. Duplication of Indoor Unit No. in same Refrigerant Group
36 Incorrect of Indoor Unit Combination
Outdoor unit and indoor unit are different Tier, brand exception
combination
38
Problem with Protective Pick-up
Circuit in Outdoor Unit
Failure of Protection Detecting Device
(Incorrect Wiring of Outdoor PCB)
3E
Combination Problem between
Inverter PCB and Outdoor PCB
Incorrect Combination between Inverter PCB and Outdoor PCB
43
Sensor on
Outdoor Unit
Activation of Pressure
Ratio Decrease Protection
Defective Compression (Failure of Compressor or Inverter, Loose
Power Supply Connection)
44
Activation of Low Pressure Increase
Protection
Overload at Cooling, High Temperature at Heating, Expansion
Valve Locking at Open Position (Loose Connector)
45
Activation of High Pressure Increase
Protection
Overload Operation (Heat Exchanger Clogging, Short Circuit of
Airow), Pipe Clogging, Excessive Refrigerant, Inert Gas Mixing
47
Activation of Low Pressure Decrease
Protection
Insufcient Refrigerant, Piping Clogging, Expansion Valve Locking
at Close Position (Loosen Connector)
48 Activation of Inverter Overcurrent Overload Operation, Compressor Failure
51
Inverter
Abnormality of Current Sensor for
Inverter
Current Sensor Failure
53 Inverter Error Signal Detection
Driver IC Error Signal Detection (Protection for Overcurrent, Low
Voltage, Short Circuit)
54
Abnormality of Inverter Fin
Temperature
Abnormal Inverter Fin Thermistor, Heat Exchanger Clogging, Fan
Motor Failure
55 Inverter Failure Inverter PCB Failure
57
Fan Controller
Abnormality of Fan Motor
Fan Motor Failure (Fan Motor Locking, Increase Fan Motor
Temperature, Blown Fuse)
5A
Abnormality ofFan Controller
FinTemperature
Fin Thermistor Failure, Heat Exchanger Clogging, Fan Motor
Failure
5b Activation of Overcurrent Protection Fan Motor Failure
5C Problem with Fan Controller Sensor Failure of Current Sensor
b0
Outdoor Unit No.
Setting
Incorrect Setting of Indoor Models
and Capacity
b1
Incorrect Setting of Unit and
Refrigerant System Number
There are 64 or More Numbers Set for Refrigerant
System.
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