Removing The Circuit Boards; Attaching The Circuit Boards - Mitsubishi Electric LGH-F300RVX-E Handbook

Step
4

Removing the circuit boards

• For the working precautions, see page 37.
• For removing the circuit boards, see (4) Control parts (For LGH-F300RVX-E to LGH-F600RVX-E)
(page 41) or (5) Control parts (For LGH-F1200RVX-E) (page 43).
5

Attaching the circuit boards

[1] According to the function status record data prepared in Step 3, set the address
setting switches, function selection switches, and model selection switch of the
new circuit board.
a. Address setting (SA1 and SA2)
b. Function selection switches and model selection switch setting (SW2, SW5,
SW7, and SW6)
[2] Attach the power circuit board in the reverse order of the steps for removing.
Make sure to connect the connectors listed in the following table.
For power supply connection
For reactor connection
For exhaust fan motor connection
For supply fan motor connection
For damper motor connection
For control circuit board connection
* Only LGH-F1200RVX-E is equipped with TAB5 and CN121.
[3] Reattach the base of the control circuit board, and then attach the connectors,
remote controller transmission cable, M-NET transmission cable, and external
signal cable, etc.
Make sure to connect the connectors or terminals listed in the following table.
( Connect PZ-61DR-E or PZ-43SMF-E transmission cable terminal, M-NET trans-
mission cable terminal, and connector/terminal for external signal cable only when
they are used.)
Connector and terminal
For thermistor connection (outdoor
temperature (OA))
For thermistor connection (indoor tem-
perature (RA))
For power circuit board connection
PZ-61DR-E or PZ-43SMF-E transmis-
sion cable terminal
M-NET transmission cable terminal
For external signal cable connection
* Only LGH-F1200RVX-E is equipped with CN21.
[4] Reattach the control box cover.
LGH-F300RVX-E to LGH-F600RVX-E : Cover screw 3 pieces
•
LGH-F1200RVX-E : Cover screw 8 pieces
•
Details
Connector Symbol on the circuit board
TAB1, TAB2, TAB5*
TAB3, TAB4
CN9
CN10
CN7
CN118, CN119, CN121*
Symbol on the circuit board
CN22
CN5
CN18, CN19, CN21*
TM4 [1] [2]
TB5 [A] [B]
TM2, TM3, CN17, CN26,
CN32, CN105
─ 46 ─
Check item
Address
setting
Function
setting
Model selec-
tion
Circuit board
fixing screw
(1 pc.)
Check
Base fixing
screw (1 pc.)
Earth fixing
screw (1 pc.)
Connector
connection
PZ-61DR-E or
PZ-43SMF-E
transmission
cable connec-
tion
M-NET trans-
Check
mission cable
connection
External
signal cable
connection
Cover screw
(black)