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SiUS28-902_a
Troubleshooting by Indication on the Remote Controller
Troubleshooting
92
3.6
“
A9
” Indoor Unit: Malfunction of Moving Part of
Electronic Expansion Valve (Y1E)
Remote
Controller
Display
A9
Applicable
Models
All indoor unit models
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Malfunction of moving part of electronic expansion valve
Defect of indoor unit P.C.B.
Defect of connecting cable
Troubleshooting
Caution
Be s
u
re to t
u
rn off the po
w
er s
w
itch
b
efore connecting or disconnecting
the connector, or parts co
u
ld
b
e damaged.
After connecting, t
u
rn the po
w
er
s
u
pply off and then
b
ack on.
Replace the mo
v
ing part of the
electronic expansion
v
al
v
e.
YES
YES
N
O
N
O
Replace the connecting ca
b
le.
If yo
u
t
u
rn the po
w
er s
u
pply off
and t
u
rn on again, and it still does
not help, replace the indoor
u
nit
P.C.B.
N
O
YES
The
electronic
expansion
v
al
v
e is
connected to X7A of the
indoor
u
nit
P.C.B.
N
ormal
w
hen coil check
(
*
1) of the mo
v
ing part of
the electronic expansion
v
al
v
e is
checked.
The connecting
ca
b
le is short-circ
u
ited or
disconnected.
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