Mitsubishi Electric PUZ-HWM140VHA Service Manual page 39

9-7. TEST POINT DIAGRAM
Outdoor controller circuit board
PUZ-HWM140VHA(-BS)
SW2
Operation
monitor function
SW7
Function switch
SW6
Model select
SW5
Function switch
SW8
Function switch
LEV-A,B,C
Linear expan-
sion valve
63H
High pressure
switch
TH34
<Plate HEX liquid>
63HS
<Pressure Sensor>
TH4
Thermistor
<Discharge>
TH3
Thermistor <Liquid>
TH7/6
Thermistor
<Ambient/
2-Phase pipe>
TH32
Thermistor
<Suction>
TH33
Thermistor
<Comp. surface>
V
FG
(Voltage between
right pins of PC5C
and PC5D, pin 3
and pin 4)
(Same as
(CNF1 (+)- (−))
7 4
V
SP
(Voltage between pins
CNF1, CNF2
of C5A, C5B):
Connect to the fan motor
0 VDC (when stopped),
1–4: 280–380 VDC
–
DC 1 6.5 V
5–4: 15 VDC
(when operated)
6–4: 0–6.5 VDC
7–4: 15 VDC (When stopped)
OCH748
PUZ-HWM140YHA(-BS)
SW1
Manual defrost,
detect history
record reset
7.5 VDC (When operated)
(0–15 V pulse)
<CAUTION> TEST POINT 1 is high voltage.
CNDM
1–2:
Input of low-level
sound priority mode
CNDC
280–380 VDC (1+, 3−)
(Outdoor power circuit board
for HWM140V)
(Noise filter circuit board for
HWM140Y)
39
21S4
4-way valve
CN4
Transmission to out-
door power circuit
board (CN4)
SV1
Connection for option
(Drain hose heater output)
CN2
Connect to the outdoor
power circuit board (CN2)
1–5: Reception from
power circuit board
2–5: Zero cross signal
(0–5 VDC)
3–4: Not used
(HWM140Y)
15 VDC
(HWM140V)
6–5: 15 VDC
7–5: 15 VDC
CNAC
2–4:
Power supply for outdoor
controller circuit board
(230 VAC)
1–3:
Power supply for indoor
and outdoor unit connec-
tion wire
(230 VAC)
+ −
Communication power
supply D71 Voltage
24 VDC
CNS
S1–S2: 230 VAC