SW2
Pump down
SW6
Function selection
SW5
Function selection
SW9
Function selection
SV1
Bypass valve
CNAC
Power supply for outdoor
multi controller circuit board
230 VAC
CNS1
Indoor/outdoor unit
connecting wire
CN4
Connect to the outdoor
power circuit board (CN4)
CNS2
Transmission wire of
centralized control
CN40,CN41
Centralized control power
supply/For storing
jumper connector selection
CN102
Connect to the M-NET
power circuit board (CN2)
CN51
External signal
output
SW4
Model selection
SW7
Manual defrost
SW3
Test run
CN2
Connect to the outdoor
power circuit board (CN2)
1
–
5
:
Power circuit board →
Transmitting signal to the outdoor
multi controller circuit board
(0–5 VDC)
2
–
5
: Zero cross signal
(0–5 VDC)
3
–
4
: 15 VDC
6
–
5
: 15 VDC
7
–
5
: 15 VDC
CNDC
310–340 VDC (Y)
310–380 VDC (V)
(
1
(+)–
3
(−))
V
CC
(TEST POINT
2
)
(Voltage between pins of
C82A): 15 VDC
(Same as CNF1
5
(+)–
4
(−))
V
SP
(Voltage between pins of
C515 and C516):
0 VDC (when stopped)
1–6.5 VDC (when operated)
(Same as CNF1
6
(+)–
4
(−))
CNF1
Connect to fan motor
1
–
4
: 310–340 VDC (Y)
: 310–380 VDC (V)
5
–
4
: 15 VDC
6
–
4
: 0–6.5 VDC
7
–
4
: 15 VDC (when stopped)
0–15 VDC pulse
(when operated)
V
DC
(TEST POINT
1
)
(Voltage between pins of C510)
: 310–340 VDC (Y)
: 310–380 VDC (V)
(Same as CNF1
1
(+)–
4
(−))
V
FG
(TEST POINT
4
)
(Voltage between pin3 and
pin4 of PC511 or PC512):
(Correspond to CNF1
7
(+)–
4
(−))
TH4 Thermistor
<Compressor>
TH7/TH6 Thermistor
<Ambient/Suction pipe>
63HS
High pressure sensor
63H
High pressure switch
TH3 Thermistor
<Outdoor liquid pipe>
CN3D
Input of silent mode or
demand control
SW1
Display selection
(Self-diagnosis)
SWU2, SWU1
Address setting
SW8
Model selection
CN3N
Auto change over
63LS
Low pressure sensor
CNLVB
Linear expansion
valve
TH2 Thermistor
<HIC pipe>
21S4
4-way valve
SS
Base heater
109
OCH668G
8-7. TEST POINT DIAGRAM
Outdoor multi controller circuit board
<CAUTION> TEST POINT
1
is high voltage.
CNLVA
Linear expansion
valve
