Mitsubishi Electric EHSD-MEC.UK Service Manual page 12

6-3. EHSC-VM6C, EHSC-VM6EC
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
BHT
BHF
2
1
2
CNBHT
3
(BLK)
1
2
CNBC
3
(GRY)
2 1
3
CNBH
2 5
(WHT)
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 <Table 3 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 <Table 3 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 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.
OCH571
F1
CNPWM
(WHT)
1
3 F2
(WHT)
3
CNP1
TBO.1
(WHT)
X1
1
1
M
1~
2
MP1 3
M
X2
3
1~
M
2WV2b 1~
4
MP2 X3
5
M TBO.1
1
1~ 6
2
MP3
X14 3
1 1
M
4 3
1~
5
3
MP4
6
CNP4
(RED)
1
1 TBO.2
3
2
TBO.2 X5A
3
Close
1
4
M N
Open
1~ 2 5
X5B
6
MXV 3
1
X4
1
4 TBO.3
1
*1 5
2
5
5 3
6
CNV1
4
(WHT)
5
6
TBO.3
7
X10
1
Signal output 8
(Boiler)
2
X11 1 TBO.4
3
Signal output
2
(Error)
4
3
X12
Signal output 5 4
(Defrost) 5
6
X15 6 1
7
Signal output
3
(Comp ON)
8
TBO.4
1 1
CNBC
X13
1
(GRY)
CNIH
M 3 3
(ORN)
2
X9
2WV2a
3
1 1
4
3
CNBH
X8
Signal output 5
(WHT)
(Cooling)
6
7
1
3
CNBHT
(BLK)
CNBC
(GRY)
2 4 6 8 10 12 14
1
1 3 5 7 9 11 13
3
TBI.1
X6
1
3
X7
5
7
CNBH
(WHT)
: connector,
1 2 1
t t
° °
OFF (Open) ON (Short)
Refer to SW2-1 in <Table 3 DIP Switch Functions>.
Refer to SW2-2 in <Table 3 DIP Switch Functions>.
Normal Heat source OFF/ Boiler operation *2
Refer to SW3-1 in <Table 3 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
Tool
6 Tool
CN01
Conductor
Conductor
Outline view Top view
1
2
CN01
4
(WHT)
6
CNP1
(WHT)
F2 F1
6.3A 250V 10A 250V
1
CNP4
(RED)
SW5 1
CN3C
(BLU)
3
8
LED1
1
1
CNPWM
CNV1
SW4 (WHT)
(WHT) 3
6
1
CNRF
(WHT)
SW3
LED2
8
1 CN105
LED3 (RED)
SW2
8
CNIT
1
(BLU)
CNIH
(ORN)
SW1
1
CN22
(BLU)
2
CNBHT
8
(BLK)
CN108
LED4
CN1A CNW5 CNW12 CN21 CN20
(WHT) (WHT) (RED) (YLW) (RED)
1 1
1 1
1
2
2
3
4
4
2 4 6 8 10 12
2 4 6 8 10 12 14
1 3 5 7 9 11 13 1 3 5 7 9 11 13
TBI.3 TBI.2
TBI.1 TBI.3
1 2 3 4 5 6 7 8 9 10 11 12 13 14 1
+ –
4 1 3 1 2
t t t
° ° °
Symbol
TB1 Terminal block <Power supply, Outdoor unit>
ECB1 Earth leakage circuit breaker for booster heater
MP1 Water circulation pump 1(Space heating & DHW)
MP2 Water circulation pump 2 (Space heating for Zone1)(Local supply)
MP3 Water circulation pump 3 (Space heating for Zone2)(Local supply)
MP4 Water circulation pump 4 (DHW)(Local supply)
3WV(2WV1) 3-way valve (2-way valve 1)(Local supply)
2WV2a 2-way valve (For Zone 1)(Local supply)
2WV2b 2-way valve (For Zone 2)(Local supply)
MXV Mixing valve (Local supply)
BHT Thermostat for booster heater
BHF Thermal fuse for booster heater
BH1 Booster heater 1
BH2 Booster heater 2
BHC1 Contactor for booster heater 1
BHC2 Contactor for booster heater 2
Symbol
BHCP Contactor for booster heater protection
TH1 Thermistor (Room temp.)(Option)
TH2 Thermistor (Ref. liquid temp.)
THW1 Thermistor (Flow water temp.)
THW2 Thermistor (Return water temp.)
THW5 Thermistor (DHW tank water temp.)(Option)
THW6 Thermistor (Zone1 flow temp.)(Option)
THW7 Thermistor (Zone1 return temp.)(Option)
OFF ON
THW8 Thermistor (Zone2 flow temp.)(Option)
OFF ON
THW9 Thermistor (Zone2 return temp.)(Option)
OFF ON
THWB1 Thermistor (Boiler flow temp.)(Option)
THWB2 Thermistor (Boiler return temp.)(Option)
OFF ON
IN1 Room thermostat 1 (Local supply)
IN2 Flow switch 1 (Local supply)
Heating DHW
IN3 Flow switch 2 (Local supply)
Close
Stop IN4 Demand control (Local supply)
Open
IN5 Outdoor thermostat (Local supply)
OFF ON
IN6 Room thermostat 2 (Local supply)
OFF ON IN7 Flow switch 3 (Local supply)
IN8 Electric energy meter 1 (Local supply)
OFF ON
IN9 Electric energy meter 2 (Local supply)
OFF ON
IN10 Heat meter (Local supply)
OFF ON
FLOW TEMP. CONTROLLER (FTC5)
Normal Error
TBO.1−4 Terminal block <Outputs>
TBI.1−3 Terminal block <Signal Inputs, Thermistor>
Normal Defrost
F1 Fuse (T10AL250V)
OFF ON
F2 Fuse (T6.3AL250V)
OFF ON
SW1−5 DIP switch *See Table 3
OFF ON
X1−15 Relay
LED1 Power supply (FTC5)
LED2 Power supply (Main controller)
LED3 Communication (FTC5-Outdoor unit)
LED4 Reading or writing data to SD card
CNPWM Pump speed control signal for MP1
CN108 SD card connector
12
Indoor unit powered
Indoor unit powered
by independent source
via outdoor unit
To outdoor To outdoor
Power supply
unit unit
~/N 230V 50Hz
L N S1 S2 S3 TB1 L N S1 S2 S3 TB1
BLK
BLK
BLK
BLK
1
1
2
2
CN01 CN01
4
(WHT) (WHT) 4
6
6
BRN BRN
1 1
CN3C CN3C
ORN
ORN
(BLU) (BLU)
3 3
Wireless receiver
(Option)
WiFi adapter
(Option)
*1
3WV 2WV1
4 5 6 4 5 6
TBO.2 TBO.2
M M
1~ 1~
3WV 2WV1
2 3 4 5 6 7 8 9 10 11 12 13 14 1 2 3 4 5 6 7 8 9 10
+ – + –
CN22
(BLU)
1 2
t ° t ° t ° t °
Name
Name
11 12 13 14
t ° t °