Mitsubishi Electric PUZ-WZ50VAA Service Manual page 54

9-6. TEST POINT DIAGRAM
Outdoor controller circuit board
PUZ-WZ50VAA.UK
PUZ-WZ50VAA-BS.UK
SW9
SW7
Function switch
Function switch
SW6
Model select
SW5
Function switch
SW8
Function switch
CNM
Connect to A control
service tool
LEV-A,B
Linear expansion valve
CNPCS
Connect to the outdoor
compressor protector
board (CNPCS)
(WZ80V)
TH34
Thermistor
<Plate hex liquid>
63HS
Pressure sensor
63L (WZ80V)
High pressure switch (FIX)
TH4
Thermistor
<Discharge>
TH3
Thermistor
<Liquid>
TH7/6
Thermistor
<Ambient/
2-phase pipe>
TH32 (WZ80V)
Thermistor
<Liquid (FIX)>
TH33
Thermistor
<Comp. Surface>
TH35 (WZ80V)
Thermistor
<Suction pipe>
V
FG
(Voltage between
right pins of PC5D,
pin 3 and pin 4)
(Same as
(CNF1 (+)– (−))
CNF1
V
Connect to the fan motor
SP
– : 280–380 V DC
(Voltage between pins
– : 15 V DC
of C5B):
– : 0–6.5 V DC
0 V DC(when stopped),
– : 15 V DC (When stopped)
1–6.5 V DC
7.5 V DC (When operated)
(0–15 V pulse)
(when operated)
OCH816
PUZ-WZ60VAA.UK
PUZ-WZ60VAA-BS.UK
SW1
Manual defrost, defect
history record reset,
refrigerant address
SW4
Function switch
CNDC
280–380 V DC ( +,
Outdoor power circuit board
PUZ-WZ80VAA.UK
PUZ-WZ80VAA-BS.UK
<CAUTION> TEST POINT1 is high voltage.
CNDM
1–2:
Input of low-level sound priority mode
1–3:
Input of external contact point
−)
54
CN51
External signal output
• Compressor operat-
ing signal
• Abnormal signal
• Connect to the out-
door compressor pro-
tector board (CN51)
(WZ80V)
21S4
4-way valve
LEV-C
Linear expansion valve
SV1
Drain hose heater output
CN4
Transmission to out-
door power circuit
board (CN4)
CN2
Connect to the outdoor
power circuit board (CN2)
– : Reception from
power circuit board
– : Zero cross signal
(0–5 V DC)
– : 15 V DC
– : 15 V DC
– : 15 V DC
CNAC
– :
Power supply for outdoor
power circuit board
(230 V AC)
– :
Power supply for indoor
and outdoor unit connection
wire (230 V AC)
63H
High pressure
switch (INV)
CNS
S1-S2: 230 V AC