Table of Contents
[8] BC controller service instruction
(1) Service panel
Work procedure
1. Remove 2 lock nuts on the control box, loose 2 lock nuts,
and remove the control box.
2. Remove 4 fixing screws on the service panel, and
remove the service panel.
3. Remove 9 machine screws on the ceiling panel, and
remove the ceiling panel.
(2) Control box
Work procedure
1. To check the inside of the control box, remove 2 lock nuts
on the control box cover.
1 Check the power wire and the terminal connection of
the transmission line.
2 Check the transformer.
3 Check the address switch.
2. When replacing the control board, take special care to
the following points.
1 Check that the board type is G or GA.
2 Check that the wire or the connector is not connected
wrongly, not disconnected or not loose.
Note) It is not required to remove 2 fixing screws on the
control box when checking the inside.
(3) Thermistor (liquid pipe/gas pipe temperature detection)
Work procedure
1. Remove the service panel.
1 For TH11, TH12 and TH15, refer to (1)-1.2.
2 For TH16, refer to (1)-1.2.3.
2. Remove the lead wire of the piping sensor from the
control board.
1 TH11, TH12 (CN10)
2 TH15, TH16 (CN11)
Note) It is not required to remove 2 fixing screws on the
control box when checking the inside.
3. Pull out the temperature sensor from the temperature
sensor housing, and replace the temperature sensor with
the new one.
4. Connect the lead wire of the temperature sensor securely
on the control board.
✻Special care must be taken when replacing heavy parts.
Loose
Control box
CMB-1016V-G, 1016V-GA
✻Special care must be taken when replacing heavy parts.
TH16
TH11
TH12
- 193 -
Explanatory figure
Ceiling panel
Service panel
Explanatory figure
Explanatory figure
CMB-1016V-GA
TH15
Hide quick links:
Table of Contents
Troubleshooting
