Gree GUHD series - Maintenance; Trouble Table

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MAINTENANCE
1 TROUBLE TABLE
Table 1 Fault Display on Indoor Wired Controller:
Trouble
Code
Trouble
Name
Origin of
Trouble Signal
Control Description
E0
Water Pump
Malfunction
Water pump
If the water-full protection cannot be recovered after 2 hours, it is believed
that the water pump is failed, in which case all the loads will be switched off
and cannot be recovered automatically.
E1
High Pressure
Protection of
Compressor
High-pressure
Switch
When high pressure protection is detected for 3 seconds successively, all
the loads (except the heating 4-way valve) will be switched off, in which
case all the keys and remote control signals except ON/OFF function will be
disabled and cannot be recovered automatically. To eliminate the fault, it is
needed to switch off and on the machine or recover from power failure.
E2
Indoor Anti-
frozen Protetion
Indoor
evaporator
sensor
If detecting that the evaporator sensor is lower than protective temp. value
after the unit has been running for a period of time under cooling or dry
mode, the unit will report this fault, in which case the compressor and
outdoor fan will be stopped. The unit will not run until this temperature
exits the pretective temperature value and the compressor is stopped for 3
minutes.
E3
Low Pressure
Protection of
Compressor
Low-pressure
Switch
If it is detected within 30 seconds successively that the low-pressure switch
is cut off under ON or standby state (If the compressor is started, the
detection will start 3 minutes after the compressor has run), the unit will
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recovered automatically. If over three times, the unit cannot be recovered
automatically.
E4
Air Discharge
High-
temperature
Protection of
Compressor
Exhaust Over
temperature
Protection
After the compressor is started, if it is detected within 30 seconds
successively that the exhaust temperature is 130
°C
or higher, E4 will
be displayed, in which case all the loads (except the 4-way valve of
heating) will be stopped. The complete unit can only be recovered until
the compressor has stopped for 3 minutes and the exhaust temperature is
lower than 90
°C
. For this protection occurs three times, the complete unit
cannot be recovered automatically.
E5
Compressor
Overload or
drive error
Compressor
After the unit is energized, if it is detected within 3 seconds successively
that the compressor overload switch is cut off, it will be deemed compressor
overload protection. In this case, all the loads will be stopped (except the
4-way valve of heating) and E5 will be displayed. If the fault is eliminated,
the compressor will be restarted after 3 minutes. If three compressor
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detection to the occurrence of fault, the compressor cannot be recovered
automatically and the buzzer will alarm. You shall need to press ON/Off to
stop the unit and clear the sound alarm before pressing ON/OFF again. The
unit will be restarted if the high pressure protection disappears; otherwise
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the controller in the event of an error of the compressor drive module.
E6
Communications
Failure
Communication
between indoor
and outdoor
mainboard
If the outdoor unit does not receive data from indoor unit for 30 seconds
successively once energized, this indicates indoor communication failure. In
this case, the compressor and outdoor fan will be stopped. Under heating
mode, the 4-way valve will be stopped if the compressor has been stopped
for 2 minutes. If the indoor unit does not receive message from outdoor unit
for 1 minute, this indicates communication failure. In this case, the indoor
unit will be stopped and the indicator will blink. If the display board does
not receive message from outdoor unit in 1 minute, it can be judged that it
is communication failure, in which case the fault will be displayed and the
machine will not function. After the communication is resumed to normal,
the system will run as per the working mode before. This can recover
automatically.