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Electrical connection
5.6 External connection of the MP 10 for terminal boxes at reduced height (Accessories)
Terminal box
PTC1
PTC2
1
2
3
4
3
4
PE
R2
X3:
Fig. 23
0,5 mm²
The compressor and the trigger unit MP10 are operational when the H3 LED (green) illuminates.
5.7 Function test of the trigger unit MP 10
Item
Procedure
LED H1 LED H2 LED H3
red
red
green
1
●
Power supply interrupted (L1 or S1)
OFF
OFF
OFF
●
Release the motor temperature sensor connection (1 or 2)
●
Release the hot gas temperature sensor (if installed) (3 or 4)
2
●
Restore the power supply (L1 or S1)
ON
●
Function check of motor temperature sensor: operational
ON
●
Function check of hot gas temperature sensor: operational
ON
3
●
Power supply interrupted again (L1 or S1)
OFF
OFF
OFF
●
Reconnect terminals 1 or 2 and/or 3 or 4
4
●
Restore the power supply (L1 or S1):
OFF
OFF
ON
●
MP 10 is operational again
Before start-up, troubleshooting or making changes to the control power circuit,
check the functionality of the trigger unit:
