Och636A - Mitsubishi Electric PUZ-A12NKA7 Service Manual

Outdoor controller circuit board
PUZ-A24NHA7
PUZ-A24NHA7-BS
PUY-A24NHA7
PUY-A24NHA7-BS
SW7 SW1
Demand control setting Manual defrost, detect
Model select history record reset,
refrigerant address
SW4
Test operation
SW6
Model select
SWP
Pump down
SW5
Function switch
Model select
CNM
Connect to A control
service tool
LEV-A,B
Linear expansion
valve
63HS
High pressure
switch
TH4
Thermistor
<Discharge>
TH3
Thermistor
<Liquid>
TH7/6
Thermistor
<Outdoor/Outdoor
2-phase pipe>
TH32
Thermistor
<Suction>
TH33
Thermistor
<Comp. surface>
V
FG
(Voltage between
right pins of PC5D,
pin 3 and pin 4)
(Same as
(CNF1 (+)– (−))
7 4
CNF1, CNF2 (CNF2: A36, 42 only)
Connect to the fan motor
1-4: 250–380 V DC
5-4: 15 V DC
6-4: 0–6.5 V DC
7-4: 15 V DC (When stopped)
7.5 V DC (When operated,
0–15 V pulse)

OCH636A

PUZ-A30NHA7
PUZ-A30NHA7-BS
PUY-A30NHA7
PUY-A30NHA7-BS
CN3S
Water heater
CNDC
250–380 V DC
−
(1+, 3 )
Outdoor power
circuit board
PUZ-A36NKA7
PUZ-A36NKA7-BS
PUY-A36NKA7
PUY-A36NKA7-BS
CNDM
1 to 2: Input of low-level
sound priority
mode
1 to 3: Input of external
contact point
+ –
(+: D72 Cathode, –: CNS-A 2pin)
Communication power supply
DC Voltage
24 V DC
67
PUZ-A42NKA7
PUZ-A42NKA7-BS
PUY-A42NKA7
PUY-A42NKA7-BS
CN51
Water heater Comp protect
21S4
4-way valve
SV3
Solenoid valve
CN4
Transmission to out-
door power circuit
board (CN4)
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: Not used
6–5: 15 V DC
7–5: 15 V DC
CNAC
2 to 4: Power supply for
outdoor controller circuit
board (230 V AC)
1 to 3: Power supply for
indoor and outdoor unit
connection wire
(230 V AC)
CNS
S1-S2: 230 V AC