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Electrical connection
5.7 Oil sump heater
ATTENTION! The oil sump heater must always be connected and operated!
In order to avoid damage to the compressor, the compressor is equipped with oil sump heater as
standart feature.
Connection:
The oil sump heater must be connected via an auxiliary contact (or parallel wired auxiliary
contact) of the compressor contactor to a seperate electric circuit.
Electrical data:
110 - 240 V - 1 - 50/60 Hz, 50 - 120 W, PTC heater, self regulating.
The compressor and the trigger unit MP10 are operational when the H3 LED (green) lights.
5.6 Function test of the trigger unit MP 10
Pos
Procedure
LED H1 LED H2 LED H3
red
red
green
1
•
Interrupt power supply (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
•
Interrupt power supply 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:
