Mitsubishi Electric Mr. SLIM MSZ-FA25VA Technical Manual página 816

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10-9. TEST POINT DIAGRAM
Outdoor controller circuit board
PUHZ-P100VHA.UK
PUHZ-P140VHA.UK
CNS
(Indoor/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 : 18V DC
6 -5 : 16V DC
7 -5 : 16V DC
[5 : – 1 ,2 ,6 ,7 : + ]
21S4
Four-way
valve
SV2
Bypass valve
(P100 only)
CN4
Transmission
to outdoor
power circuit
board (CN4)
816
PUHZ-P125VHA.UK
V
CC
(voltage between pins of C6B): DC 15V
CN51
External signal output
• Compressor operating signal
• Abnormal signal
<CAUTION> TEST POINT1 is high voltage.
(TEST POINT 2 )
63H
High pressure switch
SW10
SW9
Model select
CNDM
1 to 2 : Input of silent mode
1 to 3 : Input of external
contact point
(TEST POINT 1 )
V
DC
(voltage between pins of C5E)
: 280V-380V DC
CNDC
280V-380V DC
+
}
Connect from out-
door power circuit
–
board
(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
FG
(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
Linear expansion valve
SW5
Function switch
SW6
Model select
SW1
Forced defrost,
detect history
record reset,
refrigerant address
SWP
SW7
pump down
Demand control setting
SW4
Test operation