Maintenance; Trouble Table - INVENTOR u-match on/off Service Manual

U-MATCH AIR CONDITIONERS

MAINTENANCE

1 TROUBLE TABLE

Trouble
Trouble Name
Code
E0 Pump Failure
Compressor High
E1
Pressure Protection
Indoor Frost-Proof
E2
Protection
Compressor Low
E3
Pressure Protection
Compressor Exhaust High
E4
Temperature Protection
Compressor
E5
Overheat
Origin of
Trouble Signal
If water full protection continues for 2 hours and fails to restore,
Pump it is believed that the water pump is at fault and all loads are shut
off and fail to restore automatically.
When high voltage protection is detected for continuous 3
seconds, all loads are shut off (except for the four way valve), all
buttons and remote control signals except for power-on or
High voltage switch
power-off are shielded and fail to restore automatically, the unit
should be powered off and on, or failure should be removed after
power supply is restored.
When the unit has been running for refrigeration or
dehumidification for a period of time and evaporator thermal
Evaporator of indoor
bulb is detected to be lower than -2 , the unit will report a fault
unit
and stops the compressor and the outdoor unit. The unit will
Thermal bulb
begin to operate after temperature is
keeps outage for 3 minutes.
When the unit is started or at standby (detection will begin 3
minutes after the compressor is started up) and detected
breakdown of the low voltage switch for continuous 30 seconds,
Low voltage switch
a fault is reported. The unit can be restored automatically after
the first 2 reported faults within 30 minutes. The third reported
fault and so on can not be restored automatically.
After the compressor is started, if discharge temperature is
detected to be more than or equal to 130 degree for continuous
30 seconds, E4 will be displayed, all loads (except for the four
Discharge thermal
way valve) will be shut off, the compressor will stop for 3
bulb
minutes and the complete system will restore after discharge
temperature is lower than 90 degree. If such fault is reported for
successive three times, the protection can not be restored itself.
After the compressor is started, if the overload switch of the
compressor is detected to shut off, the fault is reported. All loads
(except for the four way valve) are shut off, the fault is displayed,
Compressor
and the compressor will stop for 3 minutes. If the fault is
removed, the compressor can be restarted to run. If successive
three compressor overload protection faults are detected within
MAINTENANCE
Control Description
10 and the compressor
89