Gree GRS-CQ6.0Pd/Na-K Service Manual page 109

AIR-TO-WATERHEATPUMP
Comp High-pressure
E1
protection
Comp Low- pressure
E3
protection
Comp Discharge temp
E4
protection
Indoor capacity switch
C5
error
Communication
malfunction（between
E6
outdoor and indoor
mainboard）
Communication
malfunction（between
E6
outdoor mainboard and
wired controller）
Comp High-pressure switch is
broken or the wiring is loose.
The water in the tank is not
enough.
The installation of tank temp
sensor is not correct.
The gas valve and liquid valve
are not fully open.
The electric expansion valve
can not work normally.
Comp Low-pressure switch is
broken or the wiring is loose.
The system has leaked.
The fans stop running or
reverse.
The resistance of temperature
sensor is not correct.
The electric expansion valve is
blocked.
The system has leaked.
Mainboard of outdoor unit is
damaged.
The communication line of the
unit is not connected.
The communication line is not
through.
The communication line of the
unit is not connected correctly.
The two ends
communication line are not
mounted with magnetic ring.
The outdoor unit is
electrically powered
The communication line of the
unit is not connected.
The communication line is not
through.
The communication line of the
unit is not connected correctly.
The two ends
MAINTENANCE
De-energize the unit and then,
energize it again.
malfunction is removed, the
code will be cleared.
It will be cleared if the
malfunction is removed after
the unit has been turned off.
It will be cleared if the
discharge temp is lower than
92 ℃.
De-energize the unit and then,
energize it again.
malfunction is removed, the
code will be cleared.
It will be cleared
communication recovers or it
of will be shown all the time
not
It will be cleared
communication recovers or it
will be shown all the time
of
If the
If the
once
once
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