Digitus DN-97330 - 5 Troubleshooting; Common Fault Alarm Phenomenon and Measures

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5. Troubleshooting
5.1. Common Fault Alarm Phenomenon and Measures
Air conditioning failure mainly for refrigeration system failure, control system
failure, the ventilation system failures and communications failures, some of
Common symptoms and treatment recommendations Table 5-1 Common
alarm phenomenon and measures.
Table 5-1 Common fault alarm phenomenon and measures
Symptom
Possible Causes
Responses
The unit
does not
start
The unit is not
powered on
Check the input power supply
apparatus, the wiring is solid
Power sequence is
wrong
Check the phase sequence power
and wiring
Compressor
overload
Thermal overload
Check the air conditioning
Refrigerated space Insulation and
sealing the case, the necessary
Time Plus equipment
Excessive refrigerant
system
Excess refrigerant discharged
within the system
Compressor own fault
Compressor axle, the motor coil
insulation in question must be
replaced compressor
Supply Voltage Value
Negative power supply voltage
instability factor
Compressor loose
wiring
Good re-tighten the compressor
terminal
High
pressure
protection
alarm
Pressure protection
switch fault
Replace the pressure protection
switch
Expansion valve is too
loose,
Appropriately adjusting the
opening degree of the expansion
valve