Mitsubishi Electric Mr.SLIM PUHZ-RP1.6VHA Technical & Service Manual page 54

Outdoor controller circuit board
PUHZ-RP4YHA
PUHZ-RP5YHA
PUHZ-RP6YHA
CNS
(Branch box/outdoor unit
connecting wire)
Communication
power supply
ZD71 Voltage
developed across:
16-30V DC
+
–
CNAC
2 to 4: Power supply for
outdoor controller
circuit board
(220V-240V AC)
1 to 3: Power supply for
indoor and outdoor unit
connection wire
(220V-240V AC)
CN2
Connect to the outdoor
power circuit board (CN2)
1-5:
Power circuit board
Transmitting signal to
the controller circuit board
(0-5V DC)
2-5: Zero cross signal
(0-5V DC)
3-4: Not used
6-5: 16V DC
7-5: 16V DC
[5: – 1,2,6,7: + ]
21S4
Four-way valve
SV2
Solenoid
valve
CN4
Transmission
to outdoor
power circuit
board (CN4)
(TEST POINT 2)
V
CC
(voltage between pins of C6B): DC 15V
SW10
CN51
Model setup
CNDM
1 to 2: Input of silent mode
1 to 3: Input of external
contact point
54
<CAUTION> TEST POINT1 is high voltage.
V
(voltage between pins of C5E)
: DC280V-350V
63H
High pressure switch
SW9
SW4
Test operation
(TEST POINT 1)
DC
CNDC
DC280V-350V
+
}
Connect from
outdoor power
–
circuit board
(CNDC)
(TEST POINT 3)
V
SP
(voltage between pins of
C5A, C5B): DC 0V (when
stopped), DC 1– 6.5V
(when operated)
(TEST POINT 4)
V
FB
(voltage between right
pins of PC5C and
PC5D, pin 3 and pin 4)
TH6
Thermistor
<Outdoor 2-phase pipe>
TH7
Thermistor<Outdoor>
TH3
Thermistor
<Outdoor pipe>
TH4
Thermistor
<Discharge>
LEV-A,-B
Linear expansion valve
63L
Low pressure switch
SW5
Function switch
SW6
Model select
SW1
Forced defrost,
detect history
record reset,
refrigrant address
SW7