Mitsubishi Electric EHPT20Q-VM2EA Service Manual page 50

10-7. Test point diagram
FTC (Controller board)
CNP1/OUT1
Water
circulation
pump1(230V)
CNPA/OUTA
Water
circulation
pumpA(230V)
OUT3(TBO1. 1-2)
2-way valve2b
(230V AC)
OUT3(TBO1. 3-4)
2-way valve2a
(230V AC)
CNV1/OUT4
3-way valve
(1-3:230V AC)
CNBHT
Thermostat input
for booster heater
(1-4:230V AC)
CNBH/OUT6
Signal output
for booster heater
(1-3:230V AC)
CNOUT
Thermostat input
for outdoor unit
(2-4:230V AC)
CNOUC
Signal output
for outdoor unit
(1-3:230V AC)
CNBC
Signal output
for booster heater
protect
(230V AC)
XBL/XBN/OUTB
Relay for outdoor
unit
IN6
1
(TBI.1 1-2)
Room
thermostat 2
input
7 CN2B
Flow sensorB
input
GCH15010
1
2
3
4
2 4 6 8
1 3 5 7
1 2 3 4 5 6
IN1 IN8
2 3
(TBI.1 3-4) (TBI.1 5-6)
Room Electric energy
thermostat 1 meter 1
input
9
CN2A
8
Flow sensorA
input
F2
6.3A/250V
10 14
9
13
7 8
IN9
4
(TBI.1 7-8)
Electric energy
meter 2
CNW3
10
Thermistor
(1-3:Flow water (to tank)
temp.)
(4-5:DHW supply temp.)
50
9 10 11
IN10
5 6
(TBI.1 9-10)
Heat meter
11
CNW12
Thermistor
(1-2:Flow water temp.)
(3-4:Return water temp.)
F1
10A/250V
CN01
Power supply
(230V AC)
CN3C
Transmission
(Indoor/Outdoor)
(0-24V DC)
LED1
Power supply(FTC)
CN1A
Flow sensor1 input
CNPWM
Water circulation
pump1
(2-3:5V DC)
CNPWM3
Water circulation
pumpA
(2-3:5V DC)
LED2
Power supply
(Main remote
controller)
CNRF
Transmission
(Indoor/Wireless
receiver)
(1-2:11.5-13.2V DC)
CN105
Transmission
(Indoor/WiFi
adaptor)
(1-2:11.5-13.2V DC)
LED3
Transmission
(Indoor/Outdoor)
CN108
SD card
LED4
Reading or witing
data to SD card
CN20
Thermistor
(Room temp.)
CN22/RC
(TBI.1 13-14)
Main remote
controller
(10.4-13.7V DC)
CNW5
Thermistor
(2-3:Stored water
(upper) temp.)
(4-5:Stored water
(lower)temp.)