Hitachi RCD-2.0FSNE, Installation And Operation Manual, Page: 46 / 374

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PMGB0126A rev.2 - 11/2006
TROUBLESHOOTING
Troubleshooting
Problem Causes Solution
No Activation of
Unit Operation
Indicator
Electrical Power Source Failure • Wait for Recovering of Electrical Power Supply •
Blow off Main
Switch Fuse
•
Electrical Short Circuit to Earth •
Replace the Main Switch Fuse after Eliminating
Earthing
•
Faulty Compressor Motor • Replace the Compressor and the main Switch Fuse •
Faulty Indoor Fan Motor •
Replace the indoor Fan Motor and the Main Switch
Fuse
•
Blow off
Control
Circuit Fuse
•
Electrical Short Circuit between Different Phase
Wires
•
Replace the Fuse •
Electrical Short Circuit to Earth • Replace the Fuse •
Faulty Magnetic Switch for Compressor Motor • Replace the magnetic Switch and the Fuse •
Faulty Transformer of Indoor Unit • Replace the Transformer •
Disconnected Cable of Remote Control Panel to the Indoor Unit • Replace the Cable •
Abnormality of Remote Control Switch •
Check the connection of the Remote Control Cable.
Replace the Remote Control Switch.
•
Incorrect
activation of
PCB
•
Disconnected Wire(s) to PCB of Indoor Unit • Connect Wire(s) to the PCB •
Faulty PCB of Indoor Unit • Replace the PCB of Indoor Unit •
No Activation of
Compressor and
Fan Motor (In the
Case of Indicator
Activation of
Remote Control
Switch)
Faulty Indoor Fan Motor • Replace the Indoor Fan Motor •
Faulty Outdoor Fan Motor • Replace the Outdoor Fan Motor •
Faulty magnetic switch for Outdoor Fan Motor • Replace the magnetic switch of the Outdoor Unit •
Faulty Compressor Motor of Compressor • Replace the Compressor •
Faulty Magnetic Switch for Compressor Motor • Replace the magnetic switch •
Incorrect activation of PCB •
Disconnected Wire(s) to PCB • Connect Wire(s) to the PCB •
Faulty PCB of Indoor Unit • Replace the PCB for Indoor Unit •
In case of 3~ unit installed
for first time, if an “05” code
is indicated on remote
control switch
•
Phase protection Relay •
Switch off the power supply of the unit, reverse 2 of
the phases, reapply the power and restart the unit
•
Flickering of
Indicator and Lamp
of “RUN” Switch
Faulty Internal Thermostat for Indoor Fan Motor • Replace the Indoor Fan Motor •
Disconnected Wires between Indoor Unit and Outdoor Unit • Connect the Wires Correctly •
Incorrect Activation of PCB •
Disconnected Wire(s) to the PCB • Connect Wire(s) to the PCB •
Faulty PCB of Indoor Unit • Replace the PCB for Indoor Unit •
Tripped Float Switch for Drain (only in RCI Units) •
Adjust level of the Drain pan Repair or Replace the
Drain Discharge Mechanism. Remove the Clogged
Material
•
No Speed Change
of Fan In spite of
Adjustment
Abnormality of Thermistor
for Air Inlet Discharge Temp.
•
Faulty Thermistor • Replace the Thermistor •
Disconnected Wire of Thermistor • Connect the Wire to the Thermistor •
Faulty Remote Control Switch • Replace the Remote Control Switch •
Faulty PCB of Indoor Unit • Replace the PCB of the Indoor Unit •
No Stopping
and Starting of
Compressor In
spite of Adjusting
Thermostat
Abnormality of Thermistor
for Air Inlet Temperature
•
Faulty Thermistor • Replace the Thermistor •
Disconnected Wire of Thermistor • Connect the Wire of Thermistor •
Faulty “TEMP” Switch of Remote Control Switch • Replace “TEMP” Switch of Remote Control Switch •
Faulty PCB of Indoor Unit • Replace PCB of the Indoor Unit •
Faulty Cable of Remote Control Switch • Replace the Cable •
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