73
EB: EEV ERROR (SHORT OR STUCK)
1. Error display:
IDU display: Eb
2. Applicable models:
All indoor units
3. Error definition:
EXV is stuck or shorted
4. Possible causes:
• Wire that connects to the EEV terminal is loose or broken
• The electronic expansion valve is stuck
• Main board of IDU is damaged
* Spare EEV coil for the expansion valve can be ordered through Replacement Component Division (RDC).
Power off
Power off
Is the wire
connecting EEV coil and EEV terminal
in main control board of IDU loose, shorted,
or open (resistance is 0 or infinity
between them)
Replace the body of the electronic
expansion valve
Replace the main board of IDU,
and turn on the power.
Does the error remain?
Reconnect the
Error resolved
the EEV coil
plug or replace
YES
NO
YES
YES
NO
Connect a spare coil*
for the expansion valve, and turn
on the power. Does the
error remain.
NO
Error resolved
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