Troubleshooting by Indication on the Remote Controller SiE39-404
180 Troubleshooting
2.6 “A9” Indoor Unit: Malfunction of Moving Part of Electronic
Expansion Valve (20E)
Remote
Controller
Display
A9
Applicable
Models
All indoor unit models
Method of
Malfunction
Detection
Detection by failure of signal for detecting number of turns to come from the fan motor
Malfunction
Decision
Conditions
When number of turns can’t be detected even when output voltage to the fan is maximum
Supposed
Causes
Malfunction of moving part of electronic expansion valve
Defect of indoor unit PC board
Defect of connecting cable
Troubleshooting
(V2781)
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Caution
After connecting, turn the power
supply off and then back on.
Replace the moving part of the
electronic expansion valve.
Replace the connecting cable.
If you turn the power supply off
and turn on again, and it still does
not help, replace the indoor unit
PC board.
YES
The connecting
cab le isshort-circuited or
disconnected.
Normal
when coil check
(∗1) of the moving part of
the electronic expansion
valve is
checked.
The
electronic
expansion valve i
s
connected to X7A of the
indoor u
nit PC
board.
YES
YES
NO
NO
NO
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