92
OPERATING PROCEDURE
PHOTOS
Photo 9
Photo 8
8. Removing the thermistor <Discharge>
(1) Remove the service panel.
(2) Disconnect the connector TH4 (2P, white) from the controller
circuit board.
(3) Loosen all the clamps for the lead wire (see photo 7).
(4) Pull out the thermistor (TH4) from the sensor holder mounted
on the compressor discharging pipe (see photo 8).
9. Removing the 4-way solenoid valve coil, the linear
expansion valve coil, and the bypass solenoid valve coil
(1) Remove the service panel.
<4-way solenoid valve coil>
(2) Disconnect the connector 21S4 (3P, green) from the controller
circuit board.
(3) Loosen all the clamps for the lead wire and cut 2 fasteners
(see photo 7).
(4) Remove the 4-way solenoid valve coil fixing screw (M5
o
6
for 200/250YHA, M4
o
6 for 200/250YHA
1
)(see photo 9).
(5) Remove the 4-way solenoid valve coil by sliding it towards
you (see photo 8, 9).
<Bypass solenoid valve coil>
(2) Disconnect the connector SV2 (3P, blue) from the controller
circuit board.
(3) Loosen all the clamps for the lead wire and cut 2 fasteners
(see photo 7).
(4) Remove the bypass solenoid valve coil fixing screw (M5
o
6)
(see photo 9).
(5) Remove the bypass solenoid valve coil by sliding it upward.
<Linear expansion valve coil>
2. Disconnect the connector LEV-A (6P, white) from the controller
circuit board.
3. Loosen all the clamps for the lead wire and cut 2 fasteners
(see photo 7).
4. Remove the linear expansion valve coil by sliding it upward
(see photo 9).
Note) When attaching the coil, make sure to tie the lead wires
with the fasteners that are equivalent to the ones you
just cut.
Bypass solenoid
valve
Thermistor
<Discharge>
(TH4)
4-way solenoid
valve coil
4-way solenoid
valve
<Side panel (right) is removed>
Linear expan-
sion valve
Linear expan-
sion valve coil
Bypass
solenoid
valve coil
fixing screw
Bypass
solenoid
valve coil
4-way sole-
noid valve
coil fixing
screw
4-way
solenoid
valve coil
4-way sole-
noid valve
Valve bed
support
Valve bed
support
fixing screw
OC338B-4.qxp 06.7.11 10:56 AM Page 92