Test Point Diagram; Ftc (Controller Board) - Mitsubishi Electric EHSE-YM9EC Service Manual

10-7. Test point diagram

FTC (Controller board)

CNP1/OUT1 (TBO.1 1–2)
Water circulation pump1
(230 V AC)
OUT2 (TBO.1 3–4)
Water circulation pump2
(Local supply) (230 V AC)
OUT3 (TBO.1 5–6)
Water circulation pump3
(Local supply) (230 V AC)
CNP4/OUT14
Water circulation pump4
(230 V AC)
OUT5 (TBO.2 1–3)
Mixing valve (Local supply)
(1–2[Close]: 230 V AC)
(2–3[Open]: 230 V AC)
OUT4 (TBO.2 4–6)
3-way valve/2-way valve
(Local supply)
(4–5: 230 V AC)
OUT10 (TBO.3 1–2)
Signal output (Boiler)
(non-voltage contact)
OUT11 (TBO.3 3–4)
Signal output (Error) (230 V AC)
OUT12 (TBO.3 5–6)
Signal output (Defrost) (230 V AC)
OUT15 (TBO.3 7–8)
Signal output (Comp on)
(230 V AC)
OUT13 (TBO.4 1–2)
2-way valve2 (230 V AC)
CNIH/OUT9 (TBO.4 3–4)
Signal output for immersion
heater (230 V AC)
OUT8 (TBO.4 5–6)
Signal output (Cooling)
(230 V AC)
CNBHT
Thermostat input for
booster heater
CNBC
Signal output for booster heater
(230 V AC)
CNBH
Signal output for booster heater
(1–3: heater1 230 V AC)
(5–7: heater2 230 V AC)
IN7
(TBI.1 1–2)
Flow switch 3 input
IN6
(TBI.1 3–4)
Room thermostat 2
input
IN5
IN3
(TBI.1 5–6)
(TBI.1 9–0)
Outdoor ther-
Flow switch
mostat input
2 input
IN4
IN2
(TBI.1 7–8)
(TBI.1 1–2)
Demand
Flow switch 1
control input
input
OCH590B
IN1 IN9
(TBI.1 3–4) (TBI.3 3–4)
Room thermo- Power meter
stat input 2 input
IN8 IN10
(TBI.3 1–2) (TBI.3 5–6)
Power meter 1 Heat meter
input input
56
THW7
(TBI.2 5–6)
CN1A
Thermistor
Flow sensor
(Zone1 return
input
water temp. )
CNW5 THW6
Thermistor (TBI.2 3–4)
(DHW tank Thermistor
water temp.) (Zone1 flow
water temp. )
CN01
Power supply
(230 V AC)
F1
10 A/250 V
F2
6.3 A/250 V
CN3C
Transmission
(Indoor/Outdoor)
(0–24 V DC)
LED1
Power supply (FTC)
CNPWM
Water circulation
pump 1
(2–3: 5 V DC)
LED2
Power supply (Main
remote controller)
LED3
Transmission
(Indoor/Outdoor)
CNRF
Transmission (Indoor/
Wireless receiver)
(1–2: 11.5–13.2 V DC)
CN105
Transmission (Indoor/
Wi-Fi adaptor)
(1–2: 11.5–13.2 V DC)
LED4
Reading or writing
data to SD card
CN22/RC(TBI.2 1–2)
Main remote controller
(10.4–13.7 V DC)
CN108
SD card
CN21
Thermistor
(Ref. liquid temp.)
CN20
Thermistor
(Room temp.)
CNW12
Thermistor
(1–2: Flow water temp.)
(3–4: Return water temp.)
THWB2
(TBI.2 3–4)
Thermistor
(Boiler return
water temp. )
THWB1
(TBI.2 1–2)
Thermistor
(Boiler flow
water temp.)
THW8 THW9
(TBI.2 7–8) (TBI.2 9–0)
Thermistor Thermistor
(Zone2 flow (Zone2 return
water temp. ) water temp. )