Mitsubishi Electric EHSC-MEC Service Manual page 20

6-7. EHSC-VM6C.UK, EHSC-VM6EC.UK, EHPX-VM6C.UK
Power supply
to Booster heater
~/N 230V 50Hz
L N
(1) (3)
ECB1
2 4
1 3 5
A1
BHCP
2 4 6 A2
BHC1
BHC2
1 3 5 A1 1 3 5 A1
2 4 6 A2 2 4 6 A2
BH1 BH2
2 2 2
BHF BHT
2
2 1
3
1
2
3
2 1
3
5
2
7
1. Symbols used in wiring diagram are,
: terminal block.
2. Indoor unit and outdoor unit connecting wires have polarities,
make sure to match terminal numbers (S1, S2, S3) for correct
wirings,
3. Since the outdoor unit side electric wiring may change, be sure to
check the outdoor unit electric wiring diagram for service.
Table 1 Signal Inputs
Name Terminal block Connector Item
IN1 TBI.1 13-14 — Room thermostat 1 input
IN2 TBI.1 11-12 — Flow switch 1 input
IN3 TBI.1 9-10 — Flow switch 2 input (Zone1) Refer to SW3-2 in <6-16. DIP switch functions>.
IN4 TBI.1 7-8 — Demand control input
IN5 TBI.1 5-6 — Outdoor thermostat input *1 Standard operation Heater operation/ Boiler operation *2
IN6 TBI.1 3-4 — Room thermostat 2 input
IN7 TBI.1 1-2 — Flow switch 3 input (Zone2) Refer to SW3-3 in <6-16. DIP switch functions>.
IN8 TBI.3 1-2 — Electric energy meter 1
IN9 TBI.3 3-4 — Electric energy meter 2
IN10 TBI.3 5-6 — Heat meter
*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and related parts may
be reduced.
*2. To turn on the boiler operation, use the main remote controller to select "Boiler" in "External input setting" screen
in the service menu.
Table 2 Outputs
Name Terminal block Connector
OUT1 TBO.1 1-2 CNP1 Water circulation pump 1 output (Space heating/cooling & DHW)
OUT2 TBO.1 3-4 — Water circulation pump 2 output (Space heating/cooling for Zone1)
Water circulation pump 3 output (Space heating/cooling for Zone2) *1
OUT3 TBO.1 5-6 —
2-way valve 2b output *2
OUT4 TBO.2 4-6 CNV1 3-way valve (2-way valve) output
TBO.2 1-2
OUT5 — Mixing valve output *1
TBO.2 2-3
OUT6 — CNBH 1-3 Booster heater 1 output
OUT7 — CNBH 5-7 Booster heater 2 output
OUT8 TBO.4 5-6 — Cooling signal output
OUT9 TBO.4 3-4 CNIH Immersion heater output
OUT10 TBO.3 1-2 — Boiler output
OUT11 TBO.3 3-4 — Error output
OUT12 TBO.3 5-6 — Defrost output
OUT13 TBO.4 1-2 — 2-way valve 2a output *2
OUT14 — CNP4 Water circulation pump 4 output (DHW)
OUT15 TBO.3 7-8 — Comp. ON signal
Do not connect to the terminals that are indicated as "—" in the "Terminal block" field.
*1. For 2-zone temperature control.
*2. For 2-zone valve ON/OFF control.
OCH571D
CNPWM
(WHT)
1
3
3
CNP1
(WHT) TBO.1
X1
1
1
M
1~
2
MP1 3
M
X2
3
1~
M
2WV2b 1~
4
MP2 X3
5
M
1~ 6
MP3
X14
1
M
1~
3
MP4
CNP4
(RED)
TBO.2
X5A
Close
1
M N
Open
1~ 2
X5B
MXV 3
X4
1
4
*1
5
5
6
CNV1
(WHT)
TBO.3
X10
1
Signal output
(Boiler)
2
X11
3
Signal output
(Error)
4
X12
Signal output 5
(Defrost)
6
X15
7
Signal output
(Comp ON)
8
TBO.4
X13
1
CNIH
M
CNBHT
(ORN)
2
(BLK)
X9
2WV2a
3
1
CNBC 4
3
X8
(GRY)
Signal output 5
(Cooling)
6
CNBH
(WHT)
1
3
CNBHT
(BLK)
CNBC
(GRY)
1
3
X6
1
3
X7
5
7
CNBH
(WHT)
: connector,
OFF (Open)
Refer to SW2-1 in <6-16. DIP switch functions>.
Refer to SW2-2 in <6-16. DIP switch functions>.
Normal Heat source OFF/ Boiler operation *2
Refer to SW3-1 in <6-16. DIP switch functions>.
Refer to installation manual.
Item
<How to use TBO.1 to 4>
1
Connect them using either way as shown below.
2
4
F1
6 Tool
CN01
F2
(WHT)
Conductor
Outline view Top view
TBO.1
1
2
3
1 CNP1
4 (WHT)
3
5
6 F2
6.3A 250V
1
1 CNP4
1 TBO.2
(RED)
3
2
3 SW5
4
5 8
LED1
6 1
1
CNV1
TBO.3
1
SW4
(WHT)
5
2
6
3
1
4
5
SW3
6
LED2
7
8 8
1
1 TBO.4
LED3
2
SW2
3
4
8
5
1
1
6 CNIH
(ORN)
3
SW1
1 1
CNBC CNBHT
8
(GRY) (BLK)
3 3
1
LED4
CNBH
(WHT)
7
CN1A CNW5 CNW12
(WHT) (WHT) (RED)
1
1
1
2
4 4
2 4 6
2 4 6 8 10 12 14 2 4 6 8 10 12 14
1 3 5 7
1 3 5 7 9 11 13 1 3 5 7 9 11 13
TBI.2
TBI.1 TBI.3
TBI.1
1 2 3 4 5 6 7 8 9 10
1 2 1 4 1 3 1 2
t ° t ° t ° t ° t °
Symbol
TB1
ECB1
MP1
MP2
MP3
MP4
ON (Short)
3WV(2WV1) 3-way valve (2-way valve 1)(Local supply)
2WV2a
2WV2b
MXV
BHT
BHF
BH1
BH2
BHC1
BHC2
BHCP
TH1
TH2
THW1
THW2
THW5
THW6
THW7
THW8
OFF ON
THW9
OFF ON
THWB1
THWB2
OFF ON
IN1
OFF ON IN2
IN3
Heating DHW
IN4
IN5
Close
Stop
IN6
Open
IN7
OFF ON
IN8
OFF ON
IN9
OFF ON
IN10
FLOW TEMP. CONTROLLER (FTC5)
OFF ON
TBO.1−4 Terminal block <Outputs>
OFF ON
TBI.1−3 Terminal block <Signal Inputs, Thermistor>
Normal Error
F1
Normal Defrost
F2
OFF ON SW1−5 DIP switch *See <6-16. DIP switch functions>.
X1−15
OFF ON
LED1
OFF ON
LED2
LED3
LED4
CNPWM Pump speed control signal for MP1
CN108
20
Indoor unit powered
Indoor unit powered
by independent source
via outdoor unit
To outdoor
Power supply
unit
~/N 230V 50Hz
Tool
L N S1 S2 S3 TB1 L N
Conductor
BLK
1
BLK
BLK
2
BLK
CN01
(WHT) 4
6 1
1
2
2
CN01 CN01
4
(WHT) (WHT) 4
F1 6
6
10A 250V
1
CN3C
BRN
(BLU)
1 1
3
CN3C CN3C
ORN
(BLU) (BLU)
3 3
1
CNPWM
(WHT)
3
CNRF Wireless receiver
(WHT)
(Option)
CN105 WiFi adapter
(Option)
(RED)
CNIT
(BLU)
1
CN22
(BLU) 2
CN108
CN21 CN20
(YLW) (RED) *1
1 1
3WV 2WV1
2
3
4 5 6 4 5 6
TBO.2 TBO.2
8 10 12
M
M
9 11 13
1~ 1~
3WV 2WV1
TBI.3
11 12 13 14 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 2 3
+ + +
– – –
CN22
(BLU)
1 2
t °
Name
Terminal block <Power supply, Outdoor unit>
Earth leakage circuit breaker for booster heater
Water circulation pump 1(Space heating/cooling & DHW)
Water circulation pump 2
(Space heating/cooling for Zone1)(Local supply)
Water circulation pump 3
(Space heating/cooling for Zone2)(Local supply)
Water circulation pump 4 (DHW)(Local supply)
2-way valve (For Zone1)(Local supply)
2-way valve (For Zone2)(Local supply)
Mixing valve (Local supply)
Thermostat for booster heater
Thermal fuse for booster heater
Booster heater 1
Booster heater 2
Contactor for booster heater 1
Contactor for booster heater 2
Contactor for booster heater protection
Thermistor (Room temp.)(Option)
Thermistor (Ref. liquid temp.)
Thermistor (Flow water temp.)
Thermistor (Return water temp.)
Thermistor (DHW tank water temp.)(Option)
Thermistor (Zone1 flow temp.)(Option)
Thermistor (Zone1 return temp.)(Option)
Thermistor (Zone2 flow temp.)(Option)
Thermistor (Zone2 return temp.)(Option)
Thermistor (Boiler flow temp.)(Option)
Thermistor (Boiler return temp.)(Option)
Room thermostat 1 (Local supply)
Flow switch 1 (Local supply)
Flow switch 2 (Local supply)
Demand control (Local supply)
Outdoor thermostat (Local supply)
Room thermostat 2 (Local supply)
Flow switch 3 (Local supply)
Electric energy meter 1 (Local supply)
Electric energy meter 2 (Local supply)
Heat meter (Local supply)
Fuse (T10AL250V)
Fuse (T6.3AL250V)
Relay
Power supply (FTC5)
Power supply (Main remote controller)
Communication (FTC5-Outdoor unit)
Reading or writing data to SD card
SD card connector
To outdoor
unit
S1 S2 S3 TB1
BRN
ORN
4 5 6 7 8 9 10 11 12 13 14
t ° t ° t ° t ° t °