Test Point Diagram - Mitsubishi Electric PUHZ-W50VHA Service Manual

9-6. TEST POINT DIAGRAM

Outdoor controller circuit board
PUHZ-W50VHA(-BS)
PUHZ-W50VHAR1(-BS)
PUHZ-W50VHAR2(-BS)
PUHZ-W50VHAR3(-BS)
Communication
+
power supply
D71 Voltage
–
24 V DC
CNS
S1-S2: 230 V AC
CNAC
2–4: Power supply for
outdoor controller circuit
board
(230 V AC)
1–3:
Power supply for inter-
face unit/Flow temp.
controller-outdoor unit
connection wire
(230 V AC)
CN2
Connect to the outdoor
power circuit board (CN2).
1–5:
Power circuit board
Transmitting signal to the
controller circuit board
(0–5 V DC)
2–5: Zero cross signal
(0–5 V DC)
3–4: Not used (W50)
18 V DC (W85)
6–5: 16 V DC
7–5: 16 V DC
[ ]
1, 2, 6, 7: +
5: –
21S4
4-way valve
SV2
Bypass valve
SV1
Drain hose heater output
CN4
Transmission to outdoor
power circuit board (CN4)
CN52C
Connect to the outdoor noise
filter circuit board. (CN52C)
OCH439M
PUHZ-W85VHA(-BS)
PUHZ-W85VHAR1(-BS)
V (TEST POINT 2)
CC
(voltage between pins of
C6B): 15 V DC
CNDM
– :Input of low level
1 2
sound priority mode
<CAUTION> TEST POINT 1 is high voltage.
CNDC
63H
280–380 V DC
High pres-
Connect from outdoor
sure switch
power circuit board.
–
SW10 SW2
Model select Operation monitor
function
68
V (TEST POINT 1)
DC
(voltage between pins of C5E):
280–330 V DC
V
SP
(voltage between pins
of C5B): 0 V DC (when
stopped), 1–6.5 V
(when operated)
V
FG
(voltage between right
pins of PC5D, pin 3
and pin 4)
TH33
Thermistor
(W50VHA(R1,R2), W85VHAR1)
<Comp. surface>
TH32
Thermistor
<Inlet water>
TH6
Thermistor
<Plate Hex liquid>
TH7
Thermistor
<Ambient>
TH3
Thermistor
<Liquid>
TH4
Thermistor
<Discharge>
LEV-A,-B
Linear expansion valve
SW8
Function switch
SW5
Function switch
SW6
Model select
SW1
Manual defrost,
detect history record
reset