Hitachi HNE Serie Manual De Instalación Y Funcionamiento página 46

TROUBLESHOOTING
Troubleshooting
■
Problem
• Electrical Power Source Failure
• Blow off Main
Switch Fuse
• Blow off
No Activation of Control
Unit Operation
Circuit Fuse
Indicator
• Faulty Transformer of Indoor Unit
• Disconnected Cable of Remote Control Panel to the Indoor Unit
• Abnormality of Remote Control Switch
• Incorrect
activation of
PCB
• Faulty Indoor Fan Motor
• Faulty Outdoor Fan Motor
• Faulty magnetic switch for Outdoor Fan Motor
No Activation of
• Faulty Compressor Motor of Compressor
Compressor and
• Faulty Magnetic Switch for Compressor Motor
Fan Motor (In the
Case of Indicator
• Incorrect activation of PCB
Activation of
Remote Control
Switch)
• In case of 3~ unit installed
for first time, if an "05" code
is indicated on remote
control switch
• Faulty Internal Thermostat for Indoor Fan Motor
• Disconnected Wires between Indoor Unit and Outdoor Unit
Flickering of
Indicator and Lamp
• Incorrect Activation of PCB
of "RUN" Switch
• Tripped Float Switch for Drain (only in RCI Units)
• Abnormality of Thermistor
No Speed Change for Air Inlet Discharge Temp.
of Fan In spite of
• Faulty Remote Control Switch
Adjustment
• Faulty PCB of Indoor Unit
• Abnormality of Thermistor
No Stopping
for Air Inlet Temperature
and Starting of
Compressor In • Faulty "TEMP" Switch of Remote Control Switch
spite of Adjusting
• Faulty PCB of Indoor Unit
Thermostat
• Faulty Cable of Remote Control Switch
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Causes
• Electrical Short Circuit to Earth
• Faulty Compressor Motor
• Faulty Indoor Fan Motor
• Electrical Short Circuit between Different Phase
Wires
• Electrical Short Circuit to Earth
• Faulty Magnetic Switch for Compressor Motor
• Disconnected Wire(s) to PCB of Indoor Unit
• Faulty PCB of Indoor Unit
• Disconnected Wire(s) to PCB
• Faulty PCB of Indoor Unit
• Phase protection Relay
• Disconnected Wire(s) to the PCB
• Faulty PCB of Indoor Unit
• Faulty Thermistor
• Disconnected Wire of Thermistor
• Faulty Thermistor
• Disconnected Wire of Thermistor
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