Mitsubishi Electric Mr.SLIM PUZ-M200YKA.UK Service Manual page 58

10-8. TEST POINT DIAGRAM
Outdoor controller circuit board
SW1
Manual defrost,
SW7
detect history
Demand control setting
record reset,
refrigerant address
SW6
Model select
SW4
Test operation
SWP
Pump down
SW5
Function switch
SW8
Pipe replace
Wiring replace
CNM
Connect to A control
service tool
CNMNT
Connect to
M-NET adapter (CN5)
CNVMNT
Connect to
M-NET adapter (CND)
LEV-A, B
Linear expansion valve
63H
High pressure switch/
Thermal protector
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 (+)– (−))
7 4
V
SP
(Voltage between pins of
C5A, C5B):
CNF1, CNF2
0 VDC (when stopped),
Connect to the fan motor
1– 6.5 VDC (when operated)
1–4: 250–330 VDC
5–4: 15 VDC
6–4: 0–6.5 VDC
7–4: 15 VDC (When stopped)
OCH737B
CNDM
1–2: Input of low-level sound priority mode
1–3: Input of external contact point
7.5 VDC (When operated)
(0–15 V pulse)
CNDC
250–330 VDC
Communication power supply
(1+, 3−)
D71 Voltage
(Noise filter circuit board)
24 VDC
58
<CAUTION> TEST POINT1 is high voltage.
CN51
External signal output
• Compressor operating signal
• Abnormal signal
CN4
Transmission to out-
door power circuit
board (CN4)
21S4
4-way valve
CN2
Connect to the outdoor
power circuit board (CN2)
1–5: Reception from
2–5: Zero cross signal
3,4: Not used
6–5: 16 VDC
7–5: 16 VDC
CNAC
2 to 4: Power supply for out-
1 to 3: Power supply for
CNS
S1–S2: 230 VAC
+ −
power circuit board
(0–5 VDC)
door controller circuit
board (230 VAC)
indoor and outdoor
unit connection
wire (230 VAC)