Mitsubishi Electric PUHZ-SW50VHA Service Manual download pdf (Page 39)

39

<CAUTION> TEST POINT1 is high voltage.

10-9. TEST POINT DIAGRAM

Outdoor controller circuit board

PUHZ-SW40VHA PUHZ-SW40VHA-BS

PUHZ-SW50VHA PUHZ-SW50VHA-BS

CNS

S1-S2: 230V AC

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)

21S4

Four-way valve

CN4

Transmission to out-

door power circuit

board (CN4)

CNDM

1 to 2: Input of low-level sound priority mode

1 to 3: Input of external contact point

SW7

Demand control setting

CN51

External signal output

• Compressor operating signal

• Abnormal signal

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: Not used

6-5: 16V DC

7-5: 16V DC

CNF1

Connect to the fan motor

1-4: 250-330V 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)

63H

High pressure

switch

SW4

Test operation

SW6

Model select

SW5

Function switch

Model select

SW1

Forced defrost,

detect history record

reset, refrigerant

address

TH4

Thermistor

<Discharge>

TH3

Thermistor

<Liquid pipe>

TH7/6

Thermistor

<Ambient/

2-phase pipe>

CNDC

250-330V DC

(1+, 3-)

(Outdoor power circuit

board for RP35-140V)

(Noise filter circuit board

for RP100-250Y)

VFG

(Voltage between

right pins of PC5C

and PC5D, pin 3

and pin 4)

(Same as

(CNF1

7(+)-4(-))

VSP

(Voltage between pins

of C5A, C5B): DC 0V

(when stopped), DC 1–

6.5V

(when operated)

LEV-A,B

Linear expansion

valve

SWP

Pump down

SW8

Pipe replace

Wiring replace

CNM

Connect to A control

service tool

TH34

Thermistor

<Comp. surface>

63HS

High pressure

sensor

OCH525

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