List Of Unit Errors; List Of Error Display On Wired Controller; Servicing - Gree GMV series Service Manual

Dc Inverter VRF plus Water Heater Solution Service Manual

SERVICING

1 LIST OF UNIT ERRORS

1.1 List of Error Display on Wired Controller

Error Error
Code Description
Compressor
E1 high-pressure
protection
Indoor
E2 antifreeze
protection
Compressor
E3 low-pressure
protection
Compressor
exhaust
E4
temperature
protection
Frequency
converter
E5
overcurrent
protection
Communication
E6
error
E7 Mode conflict
Water-full
E9
protection
Indoor ambient
F0 temperature
sensor error
Indoor coil inlet
F1 temperature
sensor error
Indoor coil
middle
F2
temperature
sensor error
Outdoor coil
inlet
F3
temperature
sensor error
Source of Error
Signal
The high pressure protection value is 4.2MPa. When it is detected
High-pressure three times successively that a compressor is under high
Switch pressure, this compressor will be stopped. In this case, error code
E1 will be displayed and the run indicator will blink.
When it is detected for 10 minutes successively that T
(varying with indoor unit), the antifreeze protection will be
Evaporator
activated, in which case the outdoor unit will immediately shut off
sensor
the indoor electronic expansion valve and the capacity will be set
to "0".
When the low pressure reaches the protection value (absolute
Low-pressure
pressure: 0.15MPa), the low pressure switch will be cut off, in
Switch
which case the low pressure protection will be displayed.
When the exhaust temperature (T
than 113 , the compressor will be stopped. Upon the first
occurrence of exhaust protection, the error code E4 will be
Exhaust displayed. When the exhaust temperature is lower than TR , the
temperature compressor will resume to operation after it has been stopped for
sensor 3 minutes. The compressor can resume to operation for the first
two times. But if this occurs three times successively in 1 hour, the
unit must be disconnected from power supply before it can
restarted.
The drive board of variable frequency compressor is incurred to
Compressor
error. For details on the error message, please refer to the Display
drive
Code on Digital Tube of Outdoor Unit.
The mainboard of indoor unit or the wired control is incurred to
Communication communication error with outdoor unit. The indoor unit incurred to
communication error will be stopped and display the error code.
The run mode of the unit that is started later is inconsistent to the
mode that is started earlier. Only the cooling and dry mode has
possible mode conflict against the heat mode. For fan mode,
User operation
there is no mode conflict against the cooling, dry or heat mode. In
case mode conflict occurs, the indoor unit with mode conflict will
display E7 and be stopped.
When water full is detected for 8 seconds successively, the
system will enter into water-full protection state, in which case the
wired controller will display E9 and give out alarm. In case of
Water pump water-full protection under each mode, the other loads of the
indoor unit will be stopped, except that the water pump will remain
working and give out alarm. In this case, the outdoor unit shall
adjust the capacity output accordingly
Indoor room The indoor unit incurred to sensor error will display error code and
sensor be stopped.
Indoor coil-inlet
The indoor unit incurred to sensor error will display error code and
temperature
be stopped.
sensor
Indoor
coil-middle The indoor unit incurred to sensor error will display error code and
temperature be stopped.
sensor
Indoor coil-exit
The indoor unit incurred to sensor error will display error code and
temperature
be stopped.
sensor
Notes on Control
℃
SERVICING
is ≤-2 ℃
evap.
) is equal to and higher
exhau.
℃