Mitsubishi Electric PUMY-P112VKM4 Technical & Service Manual page 116

8-9. TEST POINT DIAGRAM
Outdoor multi controller circuit board
PUMY-P112VKM4(-BS)
PUMY-P112VKM4R1(-BS)
PUMY-P112YKM4(-BS)
PUMY-P112YKM4R1(-BS)
PUMY-P112YKME4(-BS)
PUMY-P112YKME4R1(-BS)
SW2
SW8
Pump down
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 POINT4)
FG
(Voltage between pin3 and
pin4 of PC511 or PC512) :
(Correspond to CNF1,2
7(+)–4(−))
CNF1, 2
V
SP
(Voltage between pins of
Connect to fan motors
1–4 : 310–340 V DC (Y)
C515 and C516) :
0 V DC (when stopped)
1–6.5 V DC (when operated)
5–4 : 15 V DC
(Same as CNF1,2 6(+)–4(−)) 6–4 : 0–6.5 V DC
7–4 : 15 V DC (when stopped)
OCH673C
PUMY-P125VKM4(-BS)
PUMY-P125VKM4R1(-BS)
PUMY-P125YKM4(-BS)
PUMY-P125YKM4R1(-BS)
PUMY-P125YKME4(-BS)
PUMY-P125YKME4R1(-BS)
SW3 SW7
Test run Manual defrost
V (TEST POINT1)
DC
(Voltage between pins of C510)
: 310–350 V DC (V)
(Same as CNF1,2 1(+)–4(−))
0–15 V DC pulse
(when operated)
<CAUTION> TEST POINT 1 is high voltage.
CN51
SW4
External signal
Model selection
output
CNDC
310–340 V DC (Y)
: 310–340 V DC (Y)
310–350 V DC (V)
: 310–350 V DC (V)
(1(+)–3(−))
116
PUMY-P140VKM4(-BS)
PUMY-P140VKM4R1(-BS)
PUMY-P140YKM4(-BS)
PUMY-P140YKM4(-BS)R1
PUMY-P140YKME4(-BS)
PUMY-P140YKME4R1(-BS)
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)
2–5: Zero cross signal
(0–5 V DC)
3–4: 18V DC (V)
6–5: 16 V DC
7–5: 16 V DC
CNAC
Power supply for outdoor
multi controller circuit board
230 V AC
SS
Base heater
SV1
Bypass valve
21S4
4-way valve
V (TEST POINT2)
CC
(Voltage between pins of
C82A) : 15 V DC
(Same as CNF1,2 5(+)–4(−))