Test Point Diagram - Mitsubishi Electric PUHZ-FRP71VHA Service Manual

10-9. TEST POINT DIAGRAM

Outdoor controller circuit board
PUHZ-FRP71VHA
SW1
SW7
Forced defrost,
Demand control setting
detect history
Model select
record reset,
refrigerant address
SW6
Model select
SW4
Test operation
SWP
Pump down
SW5
Function switch
Model select
CNM
Connect to A control
service tool
LEV-A,B,C
Linear expansion
valve
TH34
Thermistor
<Comp. surface>
63HS
High pressure
sensor
TH4
Thermistor
<Discharge>
TH3
Thermistor
<Outdoor pipe>
TH7/6
Thermistor
<Outdoor/
Outdoor 2-phase pipe>
63H
High pressure switch
V
FG
(Voltage between
right pins of PC5D,
pin 3 and pin 4)
(Same as
–
(CNF1 (+)- ( ))
7 4
V
SP
(Voltage between pins
of C5B): DC 0V
(when stopped),
DC 1– 6.5V
(when operated)
CNF1
Connect to the fan motor
1-4: 250-370V DC
5-4: 15V DC
6-4: 0-6.5V DC
7-4: 15V DC (When stopped)
OCH544
CNDM
1 to 2: Input of low-level sound priority mode
1 to 3: Input of external contact point
7.5V DC (When operated,
0V-15V pulse)
CNDC + –
250-370V DC
Communication power supply
–
(1+, 3 )
DC Voltage
Outdoor power
24V DC
circuit board
55
<CAUTION> TEST POINT1 is high voltage.
CN51
External signal output
• Compressor operating signal
• Abnormal signal
CN52C
(Connect to the noise
filter circuit board
(CN52C))
SV3
Solenoid valve
SV2
Solenoid valve
SV1
Solenoid valve
CN4
Transmission to out-
door power circuit
board (CN4)
21S4
Four-way valve
CN2
Connect to the outdoor
power circuit board (CN2)
1-5: Reception from
2-5: Zero cross signal
3,4: Not used
6-5: 15V DC
7-5: 15V DC
CNAC
2 to 4: Power supply for
outdoor controller circuit
board (230V AC)
1 to 3: Power supply for
indoor and outdoor unit
connection wire
(230V AC)
CNS2
S1-S2: 230V AC
CNS
S1-S2: 230V AC
(+: D72 Cathode, –: CNS-A 2pin)
power circuit board
(0-5V DC)