32
WARNING
CAUTION
Loose wiring may cause the terminal to overheat or result in unit malfunction.
A fire hazard may also exist.
Therefore, ensure that all wiring is tightly connected.
When connecting each power wire to the terminal, follow the instructions on “How to connect wiring to the terminal” and fasten the
wire securely with the fixing screw of the terminal board.
How to connect wiring to the terminal
n
For stranded wiring
(1) Cut the wire end with cutting pliers, then strip the insulation
to expose the stranded wiring approx. 3/8" (10mm) and tightly
twist the wire ends.
(2) Using a Phillips head screwdriver, remove the terminal screw(s)
on the terminal board.
(3) Using a ring connector fastener or pliers, securely clamp each
stripped wire end with a ring pressure terminal.
(4) Place the ring pressure terminal, and replace and tighten the
removed terminal screw using a screwdriver.
Checking voltage of terminal board
Check if the wiring AC200V or more is connected to the inter-unit
control wiring connection terminal board.
First, turn off the power and then proceed the work.
If AC200V or higher voltage is mistakenly applied to the P.C. board,
the fuse (FUSE3, 0.4A) of outdoor control P.C. board is broken and
the P.C. board will be protected.
U-72MF2U9 / U-96MF2U9 / U-120MF2U9 / U-144MF2U9
In this case, reconnect the wires correctly and disconnect the 2P connector (BLU, OC, CN76) on P.C. board.
Then, replace that connector with the 2P connector (BRN, EMG, CN69).
Cut out the jumper (JP11).
Stranded wire
Ring
pressure
terminal
Str
ip 3/8" (10mm)
Special
washer
Ring pressure
terminal
Screw and
Special washer
Terminal board
Screw
Wire
Wire
Ring
pressure
terminal
OC
JP11
CN69
CN76
FUSE3
EMG
OC
JP11
CN69
CN76
FUSE3
EMG
U-72MF2U9 / U-96MF2U9
(CR-72MF2U9/A748186)
Jumper
JP11
Jumper
JP11
Fuse
FUSE3
Fuse
FUSE3
EMG, CN69
2P connector,
BRN
EMG, CN69
2P connector,
BRN
OC, CN76
2P connector,
BLU
OC, CN76
2P connector,
BLU
U-120MF2U9 / U-144MF2U9
(CR-144MF2U9/A748187)
01_302412_Eng.indd 32
2018/7/4 13:30:48
