Mitsubishi Electric CMB-PW202V-J, Руководство по обслуживанию

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[
VIII
Troubleshooting ]
- 97 -
HWE09070 GB
[4] Servicing the WCB
1. Service panel
2. Control box
3. Thermistor (liquid pipe/gas pipe temperature detection)
*Special care must be taken when replacing heavy parts.
Work procedure Explanatory figure
1) Remove the two lock nuts on the control box, loosen the
other two, and remove the control box.
2) Remove the three fixing screws on the service panel,
and remove the service panel.
3) Remove the nine machine screws on the ceiling panel,
and remove the ceiling panel.
Work procedure Explanatory figure
(1) To check the inside of the control box, remove the
two lock nuts on the control box cover.
1) Check the terminal connection of the power wire or of
the transmission line.
2) Check the transformer.
3) Check the address switch.
(2) When the control board is replaced, the followings
must be noted.
(1) Check that the board is for use with WCB.
(2) Check that the wire and the connector are properly con-
nected.
It is not required to remove the two fixing screws on the
control box when checking the inside.
*Special care must be taken when replacing heavy parts.
Work procedure Explanatory figure
(1) Remove the service panel.
1) Check TH15 according to the procedure in section 1. 1),
2).
2) Check TH11, TH12, TH13, TH14, and TH16 according
to the procedure in section 1. 1), 2), 3).
(2) Remove the lead wire of the piping sensor from the
control board.
1) TH11,TH12,TH13, TH14 (CN10)
2) TH15,TH16 (CN11)
(3) Pull out the temperature sensor from the tempera-
ture sensor housing, and replace the temperature
sensor with the new one.
(4) Connect the lead wire of the temperature sensor se-
curely on the control board.
Loosen
Service panel
Control Box
Ceiling panel
TH13 TH11
TH15
TH14
TH16
TH12