Mitsubishi Electric Mr.SLIM PUZ-A42NHA5-BS Service Manual page 54

10-9. TEST POINT DIAGRAM
Outdoor controller circuit board
PUZ-A42NHA5
PUY-A42NHA5
SW7
Demand control setting
SW6
Model select
SW4
Test operation
SWP
Pump down
SW5
Function switch
SW8
Wiring replace
CNM
Connect to A control
service tool
CNMNT
Connect to
M-NET adapter (CN5)
CNVMNT
Connect to
M-NET adapter (CND)
LEV-A
Linear expansion
valve
TH3
Thermistor
<Outdoor pipe>
TH7/6
Thermistor
<Outdoor/2-phase pipe>
TH32
Thermistor <Shell>
63H
High pressure switch
V
FG
(TEST POINT 4)
(Voltage between
right pins of PC5C
and PC5D, pin 3
and pin 4)
(Same as
7 4
(CNF1 (+)- (-))
V
SP
(TEST POINT 3)
(Voltage between pins
of C5A, C5B):
DC 0V (when stopped),
DC 1– 6.5V
CNF1, CNF2
(when operated) Connect to the fan motor
1-4: 280V DC
5-4: 15V DC
6-4: 0-6.5V DC
7-4: 15V DC (When stopped)
7.5V DC (When operated)
(0V-15V pulse)
OCH512
PUZ-A42NHA5-BS
PUY-A42NHA5-BS
SW1
Forced defrost, detect history record reset, refrigerant address
CNDC
280V DC (1+, 3-)
(Outdoor power circuit
board)
<CAUTION> TEST POINT1 is high voltage.
+ -
Communication power supply
D71 Voltage
24V DC
54
CN51
External signal output
• Compressor operat-
ing signal
• Abnormal signal
CNDM
1 to 2:
Input of low-level
sound priority mode
1 to 3:
Input of external con-
tact point
CN52C
(Connect to the noise
filter circuit board
(CN52C))
CN4
Transmission to out-
door power circuit
board (CN4)
SV2
Bypass valve
<A24/30/36 only>
21S4
Four-way valve
<PUZ only>
CN2
Connect to the outdoor
power circuit board (CN2)
1-5: Reception from
power circuit board
2-5: Zero cross signal
(0-5V DC)
3-4: 18V DC
6-5: 16V DC
7-5: 16V DC
CNAC
2 to 4:
Power supply for out-
door controller circuit
board (208V-230V AC)
1 to 3:
Power supply for indoor
and outdoor unit con-
nection wire
(208/230V AC)
CNS
S1-S2: A208/230V AC