User Manual

20
D
GB
F
E
I
Ru
09911-01.2015-DGbFEIRu
5| Electrical connection
ATTENTION!
Terminals1-6onthetrigger
unit MP 10 and terminals PTC
1andPTC2onthecompres-
sor terminal board must not
comeintocontactwithmains
voltage.Thiswoulddestroythe
trigger unit and PTC sensors.
ThesupplyvoltageatL1-N
(+/- for DC 24 V version) must
beidenticaltothevoltageat
terminals11,12,14and43.
5.6 Electronic trigger unit MP 10
The compressor motor is tted with cold conductor temperature sensors (PTC) connected to the
electronic trigger unit MP 10 in the terminal box. Readiness to operate is signalled by the H3 LED
(green) after the power supply is applied. In the case of excess temperature in the motor winding, the
unit switches off the compressor and the H1 LED lights red.
The hot gas side of the compressor can also be protected against overtemperature using a thermal
protection thermostat (accessory). The H2 LED (red) is provided for the protection function.
Theunittripswhenanoverloadorinadmissibleoperatingconditionsoccur.Findandremedy
thecause.
5.7 ConnectionofthetriggerunitMP10
INFO!
Theunithasarestartpreventiondevice.Afteryouhaverectiedthe
fault,interruptthemainsvoltage.Thisunlockstherestartprevention
deviceandtheLEDsH1andH2goout.
INFO! ConnectthetriggerunitMP10inaccordancewiththecircuitdia-
gram.Protectthetriggerunitwithadelayed-actionfuse(F)ofmax.
4A.Inordertoguaranteetheprotectionfunction,installthetrigger
unitastherstelementinthecontrolpowercircuit.
Temperature monitoring connections:
Motor winding: Terminals 1 - 2
Thermal protection thermostat: Terminals 3 - 4
Restart prevention: Terminals 5 - 6
Fig. 19
Terminal board