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V8 VRF Indoor Units
6.1.14 b36 - Water level switch alarm error
Error display
The faulty IDU stops. Other IDUs of the same system: operate normally.
Error impact
ODU of the same system: operate normally.
The water level switch alarm is triggered when the floater of the water level switch rises to the warning water
Error trigger
level and lasts for 5 min.
Error recovery
Automatic recovery
Possible cause
Troubleshooting
56
Digital display
The drain pump/water level switch is damaged.
The water level switch plug or short-circuit plug to the WATER port of the IDU main control board is
loose.
Non-standard installation results in abnormal drainage: The drain pipe is blocked; the improperly
sloped drain pipe causes the condensate water to flow backwards; and the lift of the drain pipe exceeds
the allowable value.
The IDU main control board is damaged.
b36
Panel, display box, and wired controller
Cause 1: The water pump
suction or discharge is
blocked by dirt
Cause 2: The water level
switch plug or short-circuit
plug to the WATER port of
the IDU main control board is
loose (1)
Cause 3: The water level
switch is damaged (2)
Cause 4: The water level
switch floater is clogged
Cause 5: The pump outlet
does not discharge water or
discharge flow is very small
(3)
Cause 6: Non-standard
installation results in
abnormal drainage (4)
Cause 7: Connect the short-
circuit plug to the WATER
port of the main control
board. If the error persists, it
can be determined that the
main control board is
damaged
Display position
Remove dirt and clean
the drainage pan and
drain pipe
Reconnect the loose
plug
Replace the water
level switch
Move the floater to
remove impurities and
reset the floater switch
Take measures
according to Note (3)
Take measures
according to Note (4)
Replace the main
control board of the
IDU
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