Mitsubishi Electric PUHZ-W50VHA-BS Service Manual page 58

9-6. TEST POINT DIAGRAM
Outdoor controller circuit board
PUHZ-W50VHA(-BS)
PUHZ-W85VHA(-BS)
Communication
+
power supply
D71 Voltage
–
24 V DC
CNS
S1-S2: 230 V AC
CNAC
2 to 4: Power supply for
outdoor controller circuit
board
(230 V AC)
1 to 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)
18V DC (W85)
6-5: 16 V DC
7-5: 16 V DC
[ 5: – 1,2,6,7: + ]
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)
OCH439H
PUHZ-W50VHAR1(-BS)
PUHZ-W85VHAR1(-BS)
(TEST POINT 2)
V
CC
(voltage between pins of
C6B): DC 15 V
CNDM
1 2
to :Input of low level
sound priority mode
<CAUTION> TEST POINT 1 is high voltage.
PUHZ-W50VHAR2(-BS)
CNDC
63H
DC 280 V -380 V
High pres-
Connect from outdoor
sure switch
power circuit board.
–
SW10
Model select
58
(TEST POINT 1)
V
DC
(voltage between pins of C5E)
: DC 280 V-330 V
V
SP
(voltage between pins
of C5B): DC 0 V (when
stopped), DC 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 temperature>
TH32
Thermistor
<Inlet water temperature>
TH6
Thermistor
<Plate Hex liquid
temperature>
TH7
Thermistor
<Ambient temperature>
TH3
Thermistor
<Liquid temperature>
TH4
Thermistor
<Discharge>
LEV-A,-B
Linear expansion valve
SW8
Function switch
SW5
Function switch
SW6
Model select
SW1
Forced defrost,
detect history record
reset
SW2
Operation monitor
function