GEA Bock HGX34e/380-4 - Electronic Trigger Unit Functions; MP10 and INT69 G Unit Operations

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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.