INVENTOR u-match on/off, Service Manual

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U-MATCH AIR CONDITIONERS MAINTENANCE
90
Trouble
Code
Trouble Name
Origin of
Trouble Signal
Control Description
30 minutes, the unit can not be restored itself and the buzzer will
give out an alarm. Push the ON/OFF button to shut off the unit.
And then push ON/OFF button again, if high voltage protection
disappears, operation will restore, or otherwise, the fault is
displayed.
E6
Communications
Failure
Communication
When outdoor unit is energized and fails to receive data of indoor
unit within 30 seconds, an indoor unit communication fault is
reported. The compressor and the outdoor unit will be shut off,
and the four way valve will be stopped 2 minutes after the
compressor outage in heating state.
If indoor unit fails to receive information of outdoor unit, a
communication fault is reported. The indoor unit is shut off and
an indicator is twinkling. If the display board fails to receive
information of outdoor unit, a communication fault is determined
and displayed and the unit does not actuate. After communication
becomes normal, the system can restore to the previous running
state itself.
E8
Indoor Fan
Protection
Indoor unit
If fan overload protection is detected for continuous 3 seconds,
relevant compressor and fan shall be shut off immediately and a
fault code E8 is displayed, and at the same time, the buzzer gives
out an alarm. Push the ON/OFF key, if the fault disappears, clear
the fault display and push the ON/OFF key for restarting the
system.
E9
Full Water
Protection
Liquid level switch
Water full is detected for continuous 8 seconds after the system is
powered on, the water full protection is initiated and the indicator
is twinkling (or E9 is displayed). Under refrigeration and
dehumidification mode, the outdoor fan and the compressor are
shut off and the indoor fan stops after 1 minute delay; under
heating mode, he outdoor fan and the compressor are shut off, the
four way valve keeps at the previous status, and the indoor fan
stops after 1 minute delay; under air supply mode, the load of
indoor unit remains.
F0
Failure of Indoor Room
Sensor at Air Intake
Indoor environment
Thermal bulb
Open-circuit or short-circuit of the indoor environment thermal
bulb is detected for continuous 5 seconds, indoor environment
temperature will be set compulsively at 24 degree, the system
does not take any measure, and only the indicator is twinkling or
fault code F0 is displayed. After the fault is removed, the system
can restore operation by itself. Under air supply mode, only the