Hitachi HNE Serie Manual De Instalación Y Funcionamiento página 45

TROUBLESHOOTING
17. TROUBLESHOOTING
17.1. ALARM CODES
If RUN lamp flashes for 2 seconds, there is a failure in
transmission between Indoor Unit and Remote Control
Switch. Possible causes are:
Remote Cable broken
-
Contact Failure in Remote Control Cable
-
- IC or Microcomputer defective
In any case, ask your service contractor
-
Alarm Codes
■
Code Category
Indoor unit

Outdoor Unit

Transmission


Cycle



Sensor in Indoor Unit



Sensor on Outdoor Unit




System



Pressure


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Contents of Abnormality
Safety Device of the Indoor Unit is tripped
Safety device of outdoor unit is tripped
Abnormality between Indoor and Outdoor Unit (or Indoor)
Abnormality of Power source wiring
Abnormality high temperature in the top of comp.
Inlet Air Thermistor
Outlet Air Thermistor
Freeze protection Thermistor
Tripping of Protection Device for Fan Motor
Top Compressor Thermistor
Outdoor Air Thermistor
Evaporating thermistor (defrosting)
Incorrect Setting of Outdoor and Indoor Unit
Incorrect Setting in Indoor/Outdoor Unit No.
Abnormality of Protective Circuit in Outdoor Unit
Abnormality of Running Current at Compressor
Excessive Overload during Cooling Operation
Excessive Overload during Heating Operation
Low pressure Decrease Protection Activating
In RUN lamp flashes 6 times (5 seconds) with unit number
and alarm code displayed:

NOTE:
- The alarm code displayed (see table below) and ask your
service contractor
Failure of Fan Motor, Float Switch PCB, Relay
High pressure Switch, failure of fan Motor
Incorrect wiring, failure of PCB, tripping of Fuse.
Power supply off.
Reverse phase incorrect wiring
Insufficient Refrigerant. Ref-leakage, clogging
capillary
Failure of Thermistor, sensor, connection
Failure of Fan Motor
Failure of Thermistor, sensor, Connection
Incorrect Setting of Capacity Code.
Existence of the same Indoor Unit No. in the same
refrigerant cycle
Failure of Indoor Unit PCB. Incorrect Wiring
Connection to PCB in Outdoor Unit.
Overcurrent, Melted Fuse or failure of current
sensor.
Heat Exchanger Airflow obstacle, short circuit and
locked fan motor.
Heat Exchanger Airflow obstacle, short circuit.
Insuficient refrigerant. Refrigerant Leak (Hex Lock)
PMGB0126A rev.2 - 11/2006
Leading Cause
33