Test Point Diagram - Mitsubishi Electric EHST17D-YM9D Service Manual

10-7. Test point diagram

FTC (Controller board)
CNP1/OUT1 (TBO.1 1-2)
Water circulation pump1
(230 VAC)
OUT2 (TBO.1 3-4)
Water circulation pump2
(Local supply) (230 VAC)
OUT3 (TBO.1 5-6)
Water circulation pump3
(Local supply) (230 VAC)
CNP4/OUT14
Water circulation pump4
(230 VAC)
OUT5 (TBO.2 1-3)
Mixing valve (Local supply)
(1-2[Close]: 230 VAC)
(2-3[Open]: 230 VAC)
OUT4 (TBO.2 4-6)
3-way valve/2-way valve
(Local supply)
(4-5: 230 VAC)
OUT10 (TBO.3 1-2)
Signal output (Boiler)
(non-voltage contact)
OUT11 (TBO.3 5-6)
Signal output (Error) (230 VAC)
OUT12 (TBO.3 7-8)
Signal output (Defrost) (230 VAC)
OUT15 (TBO.4 1-2)
Signal output (Comp on)
(230 VAC)
OUT13 (TBO.4 3-4)
2-way valve2 (230 VAC)
CNIH/OUT9 (TBO.4 5-6)
Signal output for immersion
heater (230 VAC)
OUT8 (TBO.4 7-8)
Signal output (Cooling)
(230 VAC)
CNBHT
Thermostat input for
booster heater
CNBC
Signal output for booster heater
(230 VAC)
CNBH
Signal output for booster heater
(1-3: heater1 230 VAC)
(5-7: heater2 230 VAC)
IN1
(TBI.1 7-8)
Room thermostat
input
IN2
IN4
(TBI.1 5-6)
(TBI.1 1-2)
Flow switch 1
Demand
input
control input
IN3
IN5
(TBI.1 3-4)
(TBI.2 7-8)
Flow switch
Outdoor ther-
2 input
mostat input
OCH714B
IN7
(TBI.2 3-4)
Flow switch
IN8
3 input
IN6
(TBI.3 7-8)
(TBI.2 5-6)
Power meter
Room thermostat
1 input
2 input
IN10 IN9
(TBI.2 1-2) (TBI.3 5-6)
Power meter
Heat meter
input 2 input
CN1A
Flow sensor
input
THW7
(TBI.5 5-6)
Thermistor
(Zone1 return
IN12
water temp. )
(TBI.3 1-2)
Smart grid
THW6 (TBI.5 7-8)
ready 2 input
Thermistor
(Zone1 flow water temp.)
IN11 (TBI.3 3-4)
Smart grid
CNW5 Thermistor
ready 1 input
(DHW tank water temp.)
66
CN01
Power supply
(230 VAC)
F1
10 A/250 V
F2
6.3 A/250 V
CN3C
Transmission
(Indoor/Outdoor)
(0–24 VDC)
LED1
Power supply (FTC)
CNPWM
Water circulation
pump 1
(2-3: 5 VDC)
LED2
Power supply (Main
remote controller)
LED3
Transmission
(Indoor/Outdoor)
CNRF
Transmission (Indoor/
Wireless receiver)
(1-2: 11.5–13.2 VDC)
CN105
Transmission (Indoor/
WiFi adaptor)
(1-2: 11.5–13.2 VDC)
LED4
Reading or writing
data to SD card
CN22
Main remote controller
(10.4–13.7 VDC)
CN108
SD card
CN21
Thermistor
(Ref. liquid temp.)
CN20
Thermistor
(Room temp.)
CNW12
Thermistor
(1-2: Flow water temp.)
(3-4: Return water temp.)
THW10
(TBI.6 5-6)
Thermistor
(Mixing tank water temp.)
THWB1
(TBI.6 7-8)
Thermistor
(Boiler flow
water temp.)
THW9 (TBI.5 1-2)
Thermistor
(Zone2 return water temp.)
THW8 (TBI.5 3-4)
Thermistor
(Zone2 flow water temp. )