Mitsubishi Electric Lossnay LGH-50RVS-E Handbook page 45

Step
4
Removing the circuit boards
• For the working precautions, see page 35.
• For removing the circuit boards, see (6) Control parts (page 42).
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 (SW12 and SW11)
b. Function selection switches (SW2, SW5) and model selection switch (SW6)
setting
[2] Attach the power circuit board in the reverse order of the steps for removing.
Be sure to connect the connectors listed in the following table.
For power supply connection
For exhaust fan motor connection
For supply fan motor connection
For damper motor connection
For control circuit board connection
* Connect TAB1 to the power supply via the reactor.
[3] Attach the control circuit board in the reverse order of the steps for removing, and
then attach the connectors, remote controller transmission cable, M-NET trans-
mission cable, and external signal cable, etc.
Be sure to connect the connectors or terminals listed in the following table.
( Connect PZ-62DR-E transmission cable terminal, M-NET transmission cable ter-
minal, and connector/terminal for external signal cable only when they are used.)
Connector and terminal
For thermistor connection (outdoor tem-
perature (OA))
For thermistor connection (indoor tem-
perature (RA))
For power circuit board connection
PZ-62DR-E transmission cable terminal TM4 [1] [2]
M-NET transmission cable terminal
For external signal cable connection
[4] Reattach the control box cover.
Details
Connector Symbol on the circuit board
TAB1*, TAB2
CN9
CN10
CN12
CN113, CN114, CN119
Symbol on the circuit board
CN7
CN5
CN14, CN19
TB5 [A] [B]
TM2, TM3, CN17, CN23, CN26,
CN32, CN34, CN35, CN50, CN105
─ 45 ─
Check item
Address
setting
Function
setting
Model
selection
Circuit board
fixing screw
(1 pc.)
Check
PCB case fix-
ing screw
(1 pc.)
Earth fixing
screw (1 pc.)
Circuit board
fixing screw
(1 pc.)
PCB fix plate
fixing screw
(2 pcs.)
Check Connector
connection
PZ-62DR-E
transmis-
sion cable
connection
M-NET trans-
mission cable
connection
External
signal cable
connection
Cover screw
(black)
(3 pcs.)