Mitsubishi Electric PUHZ-SHW230YKA2 Service Manual page 33

Outdoor controller circuit board
PUHZ-SHW230YKA2R2
SW7
Demand control setting
SW6
Model select
SW4
Test operation
SWP
Pump down
SW5
Function switch
Model select
SW8
Pipe replace
Wiring replace
CNM
Connect to A control
service tool
LEV-A,B,C
Linear expansion
valve
TH34
<Comp. Surface>
63HS
Pressure sensor
TH4
Thermistor
<Discharge>
TH3
Thermistor
<Liquid>
63L
Low pressure switch
TH7/6
Thermistor
<Ambient,
2-phase pipe>
TH32
Thermistor
<Suction>
V
FG
(Voltage between
right pins of PC5C
and PC5D, pin 3
and pin 4)
(Same as
(CNF1 (+)- (−))
7 4
V
SP
CNF1, CNF2
(Voltage between pins
Connect to the fan motor
of C5A, C5B):
1–4: 250–330 V DC
0 V DC (when stopped),
5–4: 15 V DC
1–6.5 V DC (when oper-
6–4: 0–6.5 V DC
ated)
7–4: 15 V DC(When stopped)
7.5 V DC(When operated)
(0–15 V pulse)
OCH594B
SW1
SW9
Manual defrost, detect history record reset,
Function switch
refrigerant address
CNDC
280 V DC (1+, 3−)
(Noise filter circuit board)
33
21S4
4-way valve
CN51
External signal output
• Compressor
operating signal
• Abnormal signal
CNDM
1–2:
Input of low-level
sound priority mode
1–3:
Input of external
contact point
CN4
Transmission to
outdoor power circuit
board (CN4)
SV1
Option
(Drain hose heater output)
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: 16 V DC
7–5: 16 V DC
CNAC
2–4:
Power supply for outdoor
controller circuit board
(230 V AC)
1–3:
Power supply for
indoor and outdoor unit
connection wire
(230 V AC)
63H
High pressure
switch
CNS
S1-S2: 230 V AC