Ehsc-Vm6Eb - Mitsubishi Electric EHSC-VM2B Service Manual

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6-5. EHSC-VM6EB

Power supply
to Booster heater
~/N 230V 50Hz
L
N
(1)
(3)
ECB1
2 4
Signal
output
(Boiler)
1
3
5
A1
BHCP
3
A2
2
4
6
M
BHC1
1~
MP1
1
3
5
1
3
5
BHC2
A1
A1
M
1~
MP2
M
1~
2
4
6
A2
2
4
6
A2
MP3
*
1
Close
M
1~
Open
MXV
BH1
BH2
2
2
2
BHF
Signal
BHT
output
(Defrost)
M
1~
2WV2
2
Signal
output
(Immersion
heater)
Signal
output
(Booster
heater2+)
2
2
2
2
1
*
3WV
2WV1
TBO.1
9 10 11
TBO.1
9 10 11
M
M
1~
1~
3WV
2WV1
Table 1 Signal Inputs
Name Terminal block
Connector
IN1
TBI.1 1-2
IN2
TBI.1 3-4
CN2F
IN3
TBI.1 5-6
IN4
TBI.1 7-8
IN5
TBI.1 9-10
IN6
TBI.1 11-12
IN7
TBI.1 13-14
*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 3-4
CNP1
OUT2
TBO.1 5-6
OUT3
TBO.1 7-8
OUT4
TBO.1 9-11
CNV1
TBO.1 12-13
OUT5
TBO.1 13-14
OUT6
CNBH 1-3 Booster heater 1 output
OUT7
CNBH 5-7 Booster heater 2 output
OUT8 TBO.2 11-12
OUT9 TBO.2 9-10
CNIH
OUT10 TBO.1 1-2
OUT11 TBO.2 1-2
OUT12 TBO.2 3-4
OUT13 TBO.2 7-8
Symbol
Name
TB1
Terminal block <Power supply, Outdoor unit>
ECB1
Earth leakage circuit breaker for booster heater
MP1
Water circulation pump1(Space heating & DHW)
MP2
Water circulation pump2
(Space heating for Zone1)(Field supply)
MP3
Water circulation pump3
(Space heating for Zone2)(Field supply)
3WV(2WV1) 3-way valve (2-way valve1)(Field supply)
2WV2
2-way valve2 (Field supply)
MXV
Mixing valve (Field 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
BHCP
Contactor for booster heater protection
OCH532A
CN01
(BLK)
F1
5
3
F2
1
CNPWM
(WHT)
1
TBO.1
X10
3
1
CNP1
2
(WHT)
1
X1
3
CNP1(WHT)
4
3
X2
1 3
5
1
TBO.1
2
6
3
X3
1
7
4
5
8
6
5
X4
7
9
8
9
10
10
11
11
X5A
12
12
13
14
13
14
TBO.2
N
X5B
1
2
3
TBO.2
4
X11
5
Signal
1
6
output
7
2
(Error)
8
X12
9
3
10
11
4
1
12
5
13
3
14
6
X13
7
8
1
X9
9
3
10
1
X8
CNIH
11
(ORN)
CNBH
12
(WHT)
13
7
3
14
CNBC
1
(GRY)
3
1
3
3
CNBHT(BLK)
CN2F
CN20
CN21
CNBH
(YLW)
(RED)
(YLW)
(WHT)
X6
1
1
1
1
3
2
3
3
X7
5
2
4
6
8
10
12
7
1
3
5
7
9
11
13
1
TBI.1
3
CNBC
(GRY)
2 1
3 1
2
1
4 1
t
°
t
°
t
°
t
°
t
°
Item
OFF (Open)
Room thermostat 1 input
Refer to SW2-1 in <6-11 Dip switch setting>
Flow switch 1 input
Refer to SW2-2 in <6-11 Dip switch setting>
Flow switch 2 input (Zone1)
Refer to SW3-2 in <6-11 Dip switch setting>
Demand control input
Normal
Outdoor thermostat input *1
Standard operation
Room thermostat 2 input
Refer to SW3-1 in <6-11 Dip switch setting>
Flow switch 3 input (Zone2)
Refer to SW3-3 in <6-11 Dip switch setting>
Item
Water circulation pump 1 output (Space heating & DHW)
Water circulation pump 2 output (Space heating for Zone1)
Water circulation pump 3 output (Space heating for Zone2)
3-way valve (2-way valve1) output
Mixing valve output
Booster heater 2+ output
Immersion heater output
Boiler output
Error output
Defrost output
2-way valve 2 output
Symbol
Name
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)
THW8
Thermistor (Zone2 flow temp.)(Option)
THW9
Thermistor (Zone2 return temp.)(Option)
THWB1
Thermistor (Boiler flow temp.)(Option)
THWB2
Thermistor (Boiler return temp.)(Option)
IN1
Room thermostat 1 (Field supply)
IN2
Flow switch 1
IN3
Flow switch 2 (Field supply)
IN4
Demand control (Field supply)
IN5
Outdoor thermostat (Field supply)
IN6
Room thermostat 2 (Field supply)
IN7
Flow switch 3 (Field supply)
CN01
5
(BLK)
3
1
CNV1
(WHT)
1
CN3C
(BLU)
3
FTC4
LED3
CN105
(RED)
CNPWM
(WHT)
CNRF
(WHT)
LED4
LED2
CNIH
CN108
(ORN)
1
CN22
CNBHT
1
(BLU)
(BLK)
2
1
SW4
CNW12
CNW5
LED1
(RED)
(WHT)
1
6
1
SW2
SW1
1
2
4
1
8
1
8
4
8
10
12
14
SW3
1
3
7
TBI.2
1
8
TBI.1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
2
3
4
5
CN2F
(YLW)
1
3
t
t
t
°
°
°
ON (Short)
Heat source OFF/Boiler operation *2
Heater operation/Boiler operation *2
OFF
ON
OFF
ON
OFF
ON
OFF
ON
Heating
DHW
Stop
Close
Stop
Open
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
Normal
Error
Normal
Defrost
DHW
Heating
FLOW TEMP. CONTROLLER (FTC4)
TBO.1~2 Terminal block <Outputs>
TBI.1~2 Terminal block <Signal Inputs, Thermistor>
F1~F2 Fuse (T6.3AL250V)
SW1~4 Dip switch *See 6-11 Dip switch setting
X1~X12 Relay
LED1 Power supply (FTC4)
LED2 Power supply (Main controller)
LED3 Communication (FTC4-Outdoor unit)
LED4 Reading or writing data to SD card
CNPWM Pump speed control signal for MP1
CN108 SD card connector
1. Symbols used in wiring diagram are,
: connector,
: 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 servicing.
4. This diagram shows the wiring of indoor unit and
outdoor unit connecting wires (specification of 230V),
adopting superimposed system of power and signal.
When work to supply power separately to indoor
unit and outdoor unit was applied, refer to Figure 1.
17
Cylinder unit powered
Cylinder 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
CN01
CN01
(BLK)
(BLK)
5
5
3
3
1
1
CN3C
CN3C
(BLU)
(BLU)
BRN
BRN
1
1
ORN
ORN
3
3
Figure 1
6
7
8
9
10
11
12
13
14
CN22
(BLU)
1
2
t
t
t
°
°
°

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