Hitachi RASC UTOPIA RCI-2.0FSN1E Installations- Und Betriebshandbuch Seite 46

TROUBLESHOOTING
Troubleshooting
■
Problem
No Activation of
Unit Operation
Indicator
No Activation of
Compressor and
Fan Motor (In the
Case of Indicator
Activation of
Remote Control
Switch)
Flickering of
Indicator and Lamp
of "RUN" Switch
No Speed Change
of Fan In spite of
Adjustment
No Stopping
and Starting of
Compressor In
spite of Adjusting
Thermostat
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Causes
• Electrical Power Source Failure
• Electrical Short Circuit to Earth
• Blow off Main
• Faulty Compressor Motor
Switch Fuse
• Faulty Indoor Fan Motor
• Electrical Short Circuit between Different Phase
Wires
• Blow off
Control
• Electrical Short Circuit to Earth
Circuit Fuse
• Faulty Magnetic Switch for Compressor Motor
• Faulty Transformer of Indoor Unit
• Disconnected Cable of Remote Control Panel to the Indoor Unit
• Abnormality of Remote Control Switch
• Incorrect
• Disconnected Wire(s) to PCB of Indoor Unit
activation of
• Faulty PCB of Indoor Unit
PCB
• Faulty Indoor Fan Motor
• Faulty Outdoor Fan Motor
• Faulty magnetic switch for Outdoor Fan Motor
• Faulty Compressor Motor of Compressor
• Faulty Magnetic Switch for Compressor Motor
• Disconnected Wire(s) to PCB
• Incorrect activation of PCB
• Faulty PCB of Indoor Unit
• In case of 3~ unit installed
for first time, if an "05" code
• Phase protection Relay
is indicated on remote
control switch
• Faulty Internal Thermostat for Indoor Fan Motor
• Disconnected Wires between Indoor Unit and Outdoor Unit
• Disconnected Wire(s) to the PCB
• Incorrect Activation of PCB
• Faulty PCB of Indoor Unit
• Tripped Float Switch for Drain (only in RCI Units)
• Faulty Thermistor
• Abnormality of Thermistor
for Air Inlet Discharge Temp.
• Disconnected Wire of Thermistor
• Faulty Remote Control Switch
• Faulty PCB of Indoor Unit
• Faulty Thermistor
• Abnormality of Thermistor
for Air Inlet Temperature
• Disconnected Wire of Thermistor
• Faulty "TEMP" Switch of Remote Control Switch
• Faulty PCB of Indoor Unit
• Faulty Cable of Remote Control Switch
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Solution
• Wait for Recovering of Electrical Power Supply
• Replace the Main Switch Fuse after Eliminating
Earthing
• Replace the Compressor and the main Switch Fuse
• Replace the indoor Fan Motor and the Main Switch
Fuse
• Replace the Fuse
• Replace the Fuse
• Replace the magnetic Switch and the Fuse
• Replace the Transformer
• Replace the Cable
• Check the connection of the Remote Control Cable.
Replace the Remote Control Switch.
• Connect Wire(s) to the PCB
• Replace the PCB of Indoor Unit
• Replace the Indoor Fan Motor
• Replace the Outdoor Fan Motor
• Replace the magnetic switch of the Outdoor Unit
• Replace the Compressor
• Replace the magnetic switch
• Connect Wire(s) to the PCB
• Replace the PCB for Indoor Unit
• Switch off the power supply of the unit, reverse 2 of
the phases, reapply the power and restart the unit
• Replace the Indoor Fan Motor
• Connect the Wires Correctly
• Connect Wire(s) to the PCB
• Replace the PCB for Indoor Unit
• Adjust level of the Drain pan Repair or Replace the
Drain Discharge Mechanism. Remove the Clogged
Material
• Replace the Thermistor
• Connect the Wire to the Thermistor
• Replace the Remote Control Switch
• Replace the PCB of the Indoor Unit
• Replace the Thermistor
• Connect the Wire of Thermistor
• Replace "TEMP" Switch of Remote Control Switch
• Replace PCB of the Indoor Unit
• Replace the Cable
PMGB0126A rev.2 - 11/2006
34