Mitsubishi Electric PURY-HP144, Service Handbook

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[8-14 BC Controller Maintenance Instructions ]
HWE18220_GB chapter 8 -
97
8 Troubleshooting Based on Observed Symptoms
8-14 BC Controller Maintenance Instructions
1. Service panel
2. Control box
*Special care must be taken when replacing heavy parts.
Work procedure Explanatory figure
<KB type, J type, and 4-, 6-, 8-branch types>
1) Remove the control box by unscrewing the four fixing
screws. (Figure 1)
2) Unscrew the four service panel fixing screws. (Figure 2)
3) Remove the top panel by unscrewing the nine fixing
screws. (Figure 2)
<For J-type, 12- and 16-branch types, JA-type, and KA-type>
1) Remove the service panel (1) by unscrewing the two fix-
ing screws. (Figure 3)
2) Remove the control box by unscrewing the four fixing
screws. (Figure 3)
3) Remove the top panel by unscrewing the 10 fixing
screws. (Figure 4)
4) Remove the service panel (2) by unscrewing the two fix-
ing screws. (Figure 4)
Work procedure Explanatory figure
(1) To check the inside of the control box, re-
move 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 type is J1, JA1, or KA1.
(2) Check that the wire and the connector are
properly connected.
It is not required to remove the two fixing screws on the
control box when checking the inside.
CMB-P1016NU-J1, JA1, KA1
Service panel
Service panel (1)
Service panel (2)
Ceiling panel
Ceiling panel
(Figure 1)
(Figure 2)
(Figure 3)
(Figure 4)
Control Box
Control Box
BC controller board Relay board
Transformer
Terminal block for
transmission line
Power supply
terminal block