Mitsubishi Electric EHSC-MEC Service Manual page 28

6-15. EHSC-TM9CR2.UK EHSC-TM9CR3.UK
Power supply
to Booster heater
3~ 230V 50Hz
L1 L2 L3
(1) (3) (5)
ECB1
2 4 6
1 3 5
A1
BHCP
A2
2 4 6
BHC1
BHC2
1 3 5 A1 1 3 5 A1
2 4 6 A2 2 4 6 A2
2 2 2
BH1 BH2
BHT
BHF
2
1
2
CNBHT
3
(BK)
1
2
CNBC
3
(GY)
1
2
3
CNBH
5
2
(WH)
7
Table 1 Signal Inputs
Name Terminal block Connector Item
IN1 TBI.1 13-14 — Room thermostat 1 input *1 Refer to SW2-1 in <6-16. DIP switch functions>.
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 *2 Standard operation Heater operation/ Boiler operation *3
IN6 TBI.1 3-4 — Room thermostat 2 input *1 Refer to SW3-1 in <6-16. DIP switch functions>.
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
IN11 TBI.3 7-8 —
Smart grid ready input
IN12 TBI.3 9-10 —
IN1A TBI.3 12-14 CN1A Flow sensor
*1. Set the ON/OFF cycle time of the room thermostat for 10 minutes or more; otherwise the compressor may be
damaged.
*2. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and related parts may
be reduced.
*3. 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
1
2
4
F1
6
CNPWM
CN01
(WH)
F2
1 (WH)
3
3
CNP1
(WH) TBO.1
1 X1
1
M
1~
2
M MP1 3
X2
3
1~
M
2WV2b
1~
4
X3
MP2
5
M TBO.1
1
6
1~
2
MP3
X14
1 3 1 CNP1
M
4 3 (WH)
1~
5
3
MP4
6
CNP4
(RD)
1 CNP4
TBO.2
1
(RD)
3
2
TBO.2 X5A
3
Close
1
4
M N
1~ Open 2
5
X5B
6
3
MXV 1
X4 CNV1
1
4 TBO.3 3
1
(WH)
3
*1
5
2
5
5
3
6
CNV1
4
(WH)
5
6
TBO.3
7
X10
1
Signal output
8
(Boiler)
2
X11 1 TBO.4
3
Signal output
2
(Error)
4
3
X12
5
Signal output 4
(Defrost) 5
6
X15 6 1
CNIH
Signal output 7
(OG)
3
(Comp. ON)
8
TBO.4
1 1
CNBC
CNBHT
X13
1
CNIH (GY) (BK)
M 3 3
(OG)
2
X9
2WV2a
3
1 1
4
3
CNBH
X8
Signal output 5 (WH)
(Cooling)
6 7
1
3
CNBHT
(BK)
CNBC
(GY)
2 4 6 8 10 12 14
1
1 3 5 7 9 11 13
3
X6 TBI.1
1
3
X7
5
7
CNBH
(WH)
1 2 1
t ° t ° t °
OFF (Open)
Refer to SW2-2 in <6-16. DIP switch functions>.
Normal Heat source OFF/ Boiler operation *3
Refer to installation manual.
Item
<How to use TBO.1 to 4>
Connect them using either way as shown below.
Tool
Tool
Conductor
Conductor
Outline view Top view
1
2
CN01
(WH) 4
6
CN01
(WH)
F2 F1
IEC T6.3AL250V IEC T10AL250V
1
SW5
1
CN3C
(BU)
3 CN3C
8
LED1
(BU)
1
1
CNPWM
SW4 (WH)
3
6
1
CNRF
Wireless receiver
(WH)
(Option)
SW3
LED2
8
1 CN105 WiFi adapter
(RD) (Option)
LED3
SW2
8
CNIT
1
(BU)
SW1
1
CN22
(BU) 2
8
CN108
LED4
CN1A CNW5 CNW12 CN21 CN20
(WH) (WH) (RD) (YE) (RD) *1
1 1
1
1 1
2 2
3
4 4
TBO.2
2 4 6 8 10 12 14 2 4 6 8 10 12
1 3 5 7 9 11 13 1 3 5 7 9 11 13
TBI.2
TBI.3
TBI.1 TBI.3
1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 2 3 4 5
+ – + – +
4 1 3 1 2
t ° t °
ON (Short)
OFF ON
OFF ON
OFF ON
OFF ON
Heating DHW
Close
Stop
Open
OFF ON
OFF ON
OFF ON
OFF ON
OFF ON
Normal Error
Normal Defrost
OFF ON
OFF ON
OFF ON
28
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
BK
BK
BK
BK
1
1
2
2
CN01
4
(WH) 4
6
6
BN BN
1 1
CN3C
OG OG
(BU)
3 3
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 service.
2WV1
3WV
4 5 6 4 5 6
TBO.2
M M
1~ 1~
3WV 2WV1
6 7 8 9 10 11 12 13 14 1 2 3 4 5 6 7 8 9 10 11 12 13 14
–
CN22
CN1A
(BU)
(WH)
1 4 1 2
t ° t ° t ° t ° t ° t °
Symbol Name
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
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)
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 (Local supply)
IN2 Flow switch 1 (Local supply)
IN3 Flow switch 2 (Local supply)
IN4 Demand control (Local supply)
IN5 Outdoor thermostat (Local supply)
IN6 Room thermostat 2 (Local supply)
IN7 Flow switch 3 (Local supply)
IN8 Electric energy meter 1 (Local supply)
IN9 Electric energy meter 2 (Local supply)
IN10 Heat meter (Local supply)
IN11
Smart grid ready input (Local supply)
IN12
IN1A Flow sensor
FLOW TEMP. CONTROLLER (FTC5)
TBO.1−4 Terminal block <Outputs>
TBI.1−3 Terminal block <Signal Inputs, Thermistor>
F1 Fuse (IEC T10AL250V)
F2 Fuse (IEC T6.3AL250V)
SW1−5 DIP switch *See <6-16. DIP switch functions>.
X1−15 Relay
LED1 Power supply (FTC5)
LED2 Power supply (Main remote 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
: