Hitachi HNE Serie Manual De Instalación Y Funcionamiento página 47

TROUBLESHOOTING
Problem
• Tripped High Pressure
No Restarting of
Switch
Outdoor Fan Motor
and Compressor
after Stoppage
for Cooling
Operation (Lamp
of "RUN" Switch
and Indicator is
Flickered)
• Tripped Overcurrent
relay for Compressor
Motor
• Excessive Cooling Load
Insufficient Cooling
• Too Low Pressure
(Lamp of "RUN"
Switch activates)
• Excessively High
Pressure
Insufficient Heating
• Too Low Pressure
(Lamp of "RUN"
Switch Activates)
(Only for Heat-
Pump Models)
• Excessively High
Pressure
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Causes
• Obstacle to Air Intake of Air Discharge
for Outdoor Unit
• Insufficient Air Intake or Air Discharge
Space for Outdoor Unit
• Short Circuited Air Discharge for
Outdoor Unit
• Faulty Outdoor Fan Motor
• Overcharged Refrigerant
• Clogged Capillary Tube
• Excessively High Ambient
Temperature
• Temperature of High Air Inlet
• Temperature for Indoor Unit
• Excessively High Discharge or Suction
Pressure
• High or Low Voltage
• Faulty Compressor Motor (After
Checked Electrical Resistance)
• Faulty Overcurrent Relay
• Faulty Starting Relay
• Frequent start/stop compressor
• Insufficiently Charged Refrigerant Gas
• Refrigerant Gas Leakage
• Clogged Strainer
• Clogged Suction Piping
• Clogged Air Filter
• Obstacle to Air Intake or Air Discharge
for Indoor Unit
• Faulty Indoor Fan Motor
• Short Circuited Air Discharge for
Indoor Unit
• Same as Tripped Air Discharge for
Indoor Unit
• Clogged Strainer
• Clogged Suction Piping
• Obstacle to Air Intake or Air Discharge
for Outdoor Unit
• Faulty Outdoor Fan Motor
• Short Circuited Air Discharge for
Outdoor Unit
• Faulty Thermistor(s) for Deicer
• Same as Tripped Air Discharge for
Indoor Unit
Solution
• Remove the obstacle
• Keep the minimum Air Intake and Air Discharge Space
• Remove Any Obstacle
• Replace the Outdoor Fan Motor
• Charge Correct Refrigerant Gas
• Replace the Capillary Tube
• See Unit Working Range
• Reduce the Cooling Load
• Same as Tripped High Pressure Switch Remedy Action
• Obtain Correct Voltage
• Replace the Compressor
• Replace the Overcurrent Relay
• Replace the Starting Relay
• Replace the compressor
• Reduce the Cooling Load
• Charge Correct Refrigerant Gas
• Repair Leakage and Charge Correct Refrigerant Gas
• Repair or Replace the Strainer
• Remove the Obstacle
• Cleaning the Air Filter
• Take Away the Obstacle
• Replace the Indoor Fan Motor
• Take Away any Obstacle
• Same as Tripped High Pressure Switch Remedy Action
• Repair or Replace the Strainer
• Remove the Obstacle
• Take away the obstacle
• Replace the Outdoor Fan Motor
• Take Away any Obstacle
• Replace the Thermistor(s)
• Same as Tripped High Pressure Switch Remedy Action
PMGB0126A rev.2 - 11/2006
35