GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
185
(8) Indoor unit anti-freezing protection (L5)
Indoor unit's E2
anti-freezing protection
Is the indoor unit's
motor working
properly?
Is the indoor unit's electronic
expansion valve working
properly?
Is the indoor unit's pipe
temperature sensor working
properly?
Is the indoor temperature
lower than 23 Celsius
degrees?
Normal protection
Check the motor
Check the electronic
expansion valve
Check the
temperature sensor
Check if the return air inlet
or filter is blocked
YES
YES
YES
YES
NO
NO
NO
NO
(9) Indoor unit water overflow protection (L3)
Indoor unit water overflow
protection (L3)
Is the water tray full
of water?
Is the voltage
output of the water level
switch terminal
normal?
Replace the indoor
unit's main board.
Check the water level
switch.
Is the water pump
working properly?
Is the water pump's
output signal on the main
board normal?
Replace the indoor
unit's main board.
Check connection of
the water pump.
Is the drainage pipe blocked
or steep enough?
Clear the obstacle or
adjust the slope of the
drainage pipe.
Replace the pump.
Yes
No No
NoNo
No
Yes
Yes
Yes
Yes
To Next Page
Loading...
Need help?
General