Mitsubishi Electric Mr. Slim PUZ-M200YKA2.UK Service Manual page 58

10-8. TEST POINT DIAGRAM
Outdoor controller circuit board
SW7
Demand control setting
SW4
Test operation
SW6
Model select
SWP
Pump down
SW5
Function switch
SW8
Pipe replace
Wiring replace
CNMNT
Connect to
M-NET adapter (CN5)
CNVMNT
Connect to
M-NET adapter (CND)
CNM
Connect to A control
service tool
LEV-A,B
Linear expansion valve
63H
High pressure switch
TH4
Thermistor <Discharge>
TH3
Thermistor
<Liquid>
TH7/6
Thermistor
<Ambient/
2-phase pipe>
TH33
Thermistor
<Comp. Surface>
V
FG
(Voltage between
right pins of PC5C
and PC5D, pin 3
and pin 4)
(Same as
(CNF1 (+)- (−))
V
SP
(Voltage between pins of
C5A, C5B):
CNF1, CNF2
0 V DC (when stopped),
Connect to the fan motor
1– 6.5 V DC (when operated)
– : 250–330 V DC
– : 15 V DC
– : 0–6.5 V DC
– : 15 V DC (When stopped)
OCH775B
SW1
CNDM
Manual defrost,
to : Input of low-level sound priority mode
detect history
to : Input of external contact point
record reset,
refrigerant address
7.5 V DC (When operated)
(0–15 V pulse)
CN51
External signal output
• Compressor operating signal
• Abnormal signal
CNDC
250–330 V DC
( +, −)
Connect to the outdoor noise
filter circuit board(CNDC)
58
21S4
4-way valve
CN4
Transmission to out-
door power circuit
board (CN4)
CN2
Connect to the outdoor
power circuit board (CN2)
– : Reception from
power circuit board
– : Zero cross signal
(0–5 V DC)
, : Not used
– : 16 V DC
– : 16 V DC
CNAC
to : Power supply for
outdoor control-
ler circuit board
(230 V AC)
to : Power supply for
indoor and outdoor
unit connection
wire (230 V AC)
CNS
S1–S2: 230 V AC
+ −
Communication power supply
ZD71 Voltage
28 V DC