Mitsubishi Heavy Industries SRK20ZG-S Tech Manual page 69

(3) Installation
(a) Accessories
Printed circuit board
Pan head screw
ø4 × 8r 2 units
for fixing the printed circuit board
(b) Metal box dimension
85
40
(c) Installation Outline
1) Secure the installing board to the metal box
with the locking supports.
2) The wires are put through a grommet and
bound into a bundle with a binding band.
SC-AD-ER Board
Locking support (4 locations)
(4) Inspection Displays
Check the green LED and red LED flashing at the SC-AD-ER board.
SC-AD-ER board LED
Red Green
light off flashing
light off light off
1 flashing flashing
2 flashings flashing
3 flashings flashing
4 flashings flashing
flashings flashing
Metal box
Locking support
made of nylon 4 units
22.5
2-ø6
Binding band
Normal communication
• Open circuit at the wired remote control signal wire (X) or (Z).
• Short circuit at the wired remote control signal wire. (between X - Z)
• Power source of the indoor wired remote control is out of order.
• Open circuit at the super link signal wire (A) or (B).
• Short circuit at the super link signal wire. (between A - B)
• The super link circuit is out of order.
• Poor SC-AD-ER board address setting. (setting at No. 48 or 49)
• Open circuit at the wired remote control signal wire (Y).
• Short circuit at the wired remote control signal wire. (between X - Y or between X - Z)
• In the case of opening without a wired remote control, SC-AD-ER board "Master" setting is not performed.
• The wired remote control signal circuit is out of order.
• The address is repeated in the SC-AD-ER board and the indoor unit connected to the link network.
• The address is repeated in the SC-AD-ER board and the outdoor unit connected to the link network.
Metal cover Insulating rubber sheet
Band
for binding wires, 5 pieces
35
30
3) Attaching to the outside of a
indoor unit.
s In this case, attach the metal cover.
Inspection mode
66
- -
Binding band
4) Attaching to the back of a
wired remote control.
s In this case, attach directly to the
lower case of the wired remote
control.
Display on the
central control
device of the network
E1
E2
E31