Mitsubishi Heavy Industries SRC25QA-S, Техническое руководство

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(14) Check method for EEV
After the power is switched on, check the opening of the EEV and the sound and voltage within
10 sec. of operation.
[In operation, only the opening is changed and the voltage can’t be measured.]
1) If sound of the EEV is heard, it indicates the EEV is basically good.
2) If no sound of the EEV is heard, measure the output voltage.
3) If there is voltage, it indicates the circuit board is normal.
4) If there is voltage and the EEV can’t operate (or has no sound), it indicates the EEV is defective.
5) Check method for
EEV coil: Measure the resistance value between the terminals with a
multimeter.
Measurement point Resistance value in
normal cases
6-wire EEV 5-wire EEV
46±4Ω
(at 20
℃
)
①
-
④
(red and orange)
①
-
③
(red and green)
①
-
⑥
(red and white)
①
-
④
(red and orange)
②
-
③
(brown and green)
①
-
⑤
(red and yellow)
②
-
⑤
(brown and yellow)
①
-
⑥
(red and white)
(15) Check method for outdoor fan motor
1) 25QA-S uses AC motor .
Turn on the appliance as usual and measure whether there is 220V voltage input between the
terminals
①
and
⑦
and the terminals
①
and
⑨
of the motor for the outdoor unit (220V
voltage input between the terminals
①
and
⑦
when the air flow is high; between the
terminals
①
and
⑨
when the air flow is low). If the motor can operate normally, it indicates
the motor is normal; if there is voltage input, but the appliance can’t operate normally, it
indicates the motor is abnormal.
EEV
1 or 2
Red Brown Green Orange Yellow White
About 5V for about 10 sec. after
power is switched on
Yellow White Black Red