Mitsubishi Electric CITY MULTI PUMY-P112VKM6 Service Manual page 95

8-9. Test point diagram
■ Outdoor multi controller circuit board
Caution:
• TEST POINT 1 is high voltage.
SW8
Model selection
SW6
Function selection
SW5
Function selection
SW9
Function selection
SW1
Display selection
(Self-diagnosis)
SWU2, SWU1
Address setting
CNLVB
Linear expansion valve
CNLVA
Linear expansion valve
CN3N
Auto change over
63H
High pressure switch
CN3D
Input of silent mode or
demand control
TH2 Thermistor
<HIC pipe>
TH4 Thermistor
<Compressor>
TH3 Thermistor
<Outdoor liquid pipe>
TH7/TH6 Thermistor
<Ambient/Suction pipe>
63HS
High pressure sensor
63LS
Low pressure sensor
V (TEST POINT )
FG
(Voltage between pin3 and
pin4 of PC511 or PC512):
(Correspond to CNF1, 2
(+)– (−))
7 4
V
SP
(Voltage between pins of
C515 and C516):
0 V DC (when stopped)
1–6.5 V DC (when operated)
(Same as CNF1,2
6
(−))
4
OCH790 _95
SW2 SW3
Pump down Test run
4
CNF1, 2
(+)–
Connect to fan motors
– : 310–340 V DC (Y)
1 4
: 310–380 V DC (V)
– : 15 V DC
5 4
– : 0–6.5 V DC
6 4
– : 15 V DC (when stopped)
7 4
0–15 V DC pulse
(when operated)
SW4
SW7
Manual defrost Model selection
V (TEST POINT )
CNDC
1
DC
(Voltage between pins of C510) 310–340 V DC (Y)
: 310–340 V DC (Y)
310–380 V DC (V)
: 310–380 V DC (V)
( (+)– (−))
1
(Same as CNF1,2 (+)– (−))
1 4
CN51
External signal
output
CN102
Connect to the M-NET
power circuit board
CN40,CN41
Centralized control power
supply/For storing
jumper connector selection
CNS2
Transmission wire of
centralized control
CNS1
Indoor/outdoor unit
connecting wire
CN4
Connect to the outdoor
power circuit board.
CN2
Connect to the outdoor
power circuit board
– :
1 5
Power circuit board →
Transmitting signal to the outdoor
multi controller circuit board
(0–5 V DC)
– : Zero cross signal
2 5
(0–5 V DC)
– : 15 V DC (V)
3 4
– : 15 V DC
6 5
– : 15 V DC
7 5
CNAC
Power supply for outdoor
multi controller circuit board
230 V AC
SS
Base heater
SV1
Bypass valve
21S4
4-way valve
V (TEST POINT )
CC
(Voltage between pins of
C82A): 15 V DC
(Same as CNF1,2
3
2
(+)– (−))
5 4