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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
The compressor and the trigger unit MP10 are operational when the H3 LED (green) illuminates.
X3:
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:
Fig. 23
0.5 mm²
