Mitsubishi Electric EHGT17D-YM9ED Service Manual page 64

Controller circuit board
SW7
SW9
Function switch
Function switch
SW6
Model select
SW5
Function switch
SW8
Function switch
CNM
Connect to A control
service tool
LEV-A
Linear expansion valve
TH34
Thermistor
<Brine Outlet>
63HS
Pressure sensor
63L
Flow switch
TH4
Thermistor
<Discharge>
TH3
Thermistor
<Liquid>
TH7/6
Thermistor
<Ambient>
TH32
Thermistor
<Brine Inlet>
TH33
Thermistor
<Comp. Surface>
V
FG
(Voltage between
right pins of PC5D,
pin 3 and pin 4)
(Same as
CNF1 (+)– (−))
7 4
CNF1
V
Connect to the Brine pump motor
SP
1–4: 280–380V DC
(Voltage between pins
5–4: 15 V DC
of C5B):
6–4: 0–6.5V DC
0 V DC(when stopped),
7–4: 15 V DC (When stopped)
1–6.5 V DC
7.5 V DC (When operated)
(0–15 V pulse)
(when operated)
OCH722A
CNDM
1–2:
SW1 Input of low-level sound priority mode
Abnormal history clear
1–3:
Input of external contact point
CNDC
280–380 V DC (1+, 3−)
(Connect to the noise filter circuit board(CNDC))
64
<CAUTION> TEST POINT1 is high voltage.
CN51
External signal output
• Compressor operat-
ing signal
• Abnormal signal
CN4
Transmission to the
power circuit board
(CN4)
CN2
Connect to the power cir-
cuit board (CN2)
1–5: Reception from
power circuit board
2–5: Zero cross signal
(0–5 V DC)
3–4: Not used
6–5: 15 V DC
7–5: 15 V DC
CNAC
2–4:
Connect to the noise filter
circuit board (CNAC1,CNAC2)
Power supply for zero cross
signal circuit (230 V AC)
1–3:
Power supply for FTC circuit
board (230 V AC)
63H
High pressure
switch
CNS
Connect to the FTC
circuit board(CN01,CN3C)
S1-S2: 230 V AC