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8-6. TEST POINT DIAGRAM
Outdoor controller circuit board
PUHZ-W50VHA2
PUHZ-W50VHA2-BS
SW2
Operation
monitor function
SW6
Model select
SW5
Function switch
SW8
Function switch
LEV-A,B
Linear expan-
sion valve
63H
High pressure
switch
TH34
<Comp. Surface>
TH4
Thermistor
<Discharge>
TH3
Thermistor <Liquid>
TH7/6
Thermistor
<Ambient/
Plate HEX Liquid>
TH32
Thermistor
<Inlet Water>
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 V DC (when stopped),
–
1–4: 280–380 V DC
DC 1
6.5 V
(when operated)
5–4: 15 V DC
6–4: 0–6.5 V DC
7–4: 15 V DC (When stopped)
OCH605A
PUHZ-W50VHA2R1
PUHZ-W50VHA2R1-BS
SW1
Manual defrost,
detect history
record reset
7.5 V DC (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 V DC (1+, 3−)
29
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 V DC)
3–4: 15 V DC
6–5: 16 V DC
7–5: 16 V DC
CNAC
2–4:
Power supply for outdoor
controller circuit board
(230 V AC)
1–3:
Power supply for indoor
and outdoor unit connec-
tion wire
(230 V AC)
+ −
Communication power
supply D71 Voltage
24 V DC
CNS
S1–S2: 230 V AC
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