Test Point Diagram; Outdoor Controller Circuit Board - Mitsubishi Electric PUHZ-SW75VHA Service Manual

10-7. TEST POINT DIAGRAM

Outdoor controller circuit board

PUHZ-SW75VHA(-BS).UK
PUHZ-SW100VHA(-BS).UK
PUHZ-SW100YHA(-BS).UK
PUHZ-SW120VHA(-BS).UK
PUHZ-SW120YHA(-BS).UK
CNS
(Indoor/outdoor unit
connecting wire)
63H
High pressure
switch
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)
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 ...
(SW75V,100/120Y)
18V DC...(SW100/120V)
6-5: 16V DC
7-5: 16V DC
[5: – 1,2,6,7: + ]
21S4
Four-way valve
CN4
Transmission to out-
door power circuit
board (CN4)
CN52C
(Connect to the outdoor noise
filter circuit board (SW75V)/
the outdoor power circuit
board (SW100/120V))
Only for SW·VHA
OCH533A
(TEST POINT 2)
V
CC
(voltage between pins of
C6B): DC 15V
CN51
External signal output
• Compressor operating signal
• Abnormal signal
45
<CAUTION> TEST POINT1 is high voltage.
CNDC
DC280V-380V Connect
from outdoor power circuit
board for VHA, connect
from noise filter board for
(CNDC)
YHA
+ –
SWP
SW9
Function switch
Pump down
CNDM
1 to 2: Input of low-level sound priority mode
1 to 3: Input of external contact point
(TEST POINT 1)
V
DC
(voltage between pins of C5E)
: DC250V-380V
(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
<2-phase pipe>
TH7
Thermistor<Ambient>
TH3
Thermistor
<Outdoor pipe>
TH4
Thermistor <Discharge>
63HS
High pressure sensor
TH34
Thermistor
<Comp. surface>
LEV-A,-B
Linear expansion valve
63L
Low pressure switch
(SW100/120)
SW4
Test operation
SW5
Function switch,
Model select
SW6
Model select
SW1
Forced defrost, detect
history record reset,
refrigerant address
SW7
Demand control setting