74
ED: ODU ERROR
1. Error display:
IDU display: Ed
2. Applicable models:
All indoor units
3. Error definition:
ODU error lasts ten minutes
4. Possible causes:
ODU is not in operation
NOTE: For Heat Recovery systems, check the MDC status because it can cause errors in the ODU.
EE: CONDENSATE OVERFLOW
1. Error display:
IDU display: EE
2. Applicable models:
• With condensate pump: 40VMF, 40VMM, 40VML, 40VMH (24~54K), 40VMA, 40VMC, and 40VMI
• Without condensate pump: 40VMW, 40VMV, 40VMR, 40VMU, 40VMH (72K and 96K)
3. Error definition:
Condensate overflow -- check whether the float switch is open or closed
4. Possible causes:
• Wiring to the float switch is loose or disconnected
• The float switch to detect water level is stuck
• The water tray of the IDU has poor drainage, or the pump is damaged
• Damaged main board of IDU
YES
Check the error code of ODU to
find out an appropriate solution
Ed error is reported
Power off
Power off
NO
Install the drain
YES
Remove the drain plug
to see if water is flowing out.
Is the drain pipe installed correctly.
pipeline based on the
installation manual
Reconnect or change
the connection wire
Check whether the connection wiring or
plug is shorted, open, or loose
IDU board
Replace the main
See if the drainage outlet of the condensate
pump or water tray is dirty and blocked
Replace the condensate
pump or clean the
drainage outlet of
water tray
Use a resistance to short
connect the CN5 terminals (Pin 1 and
Pin 3) on main board. Turn on the power.
Does the “EE” error remain?
Error resolved
Change the float switch
YES
YES
YES
NO
NO
NO
NO
YES
Use the multi-meter to check the float
switch. The resistance is infinite when water level is
high and 0 if there is no water.
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