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96178-06.2015-DGbFEIRu

5| Electrical connection

PTC1

PTC2

Terminalbox

Fig.23

5.4 Electronic trigger unit MP10

Thecompressormotoristtedwithcoldconductortemperaturesensors(PTC)connectedtotheelec-

tronictriggerunitMP10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.

5.5 Connection of the trigger unit MP10

Temperaturemonitoringconnections:

Motorwinding:   Terminals1-2

Thermalprotectionthermostat: Terminals3-4

Restartprevention:   Terminals5-6

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 (FC2) of

max. 4 A. In order to guarantee the protection function, install the

triggerunitastherstelementinthecontrolpowercircuit.

ATTENTION

Terminals 1 - 6 on the trigger

unit MP10 and terminals PTC 1

and PTC 2 on the compressor

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 termi-

nals 11, 12, 14 and 43.

GEA Bock HG34e Series User Manual

Questions and Answers: