Hofmann ATC 900 - CHAPTER 6 ELECTRONIC SECTION; 6.1 Inverter T1 # EAA0358 G49 A: check and replacement

CTC-CEN Service Manual 07-13 Rev.E
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CHAPTER 6
ELECTRONIC SECTION
WARNING!
BEFORE APPROACHING THE ELECTRONIC PARTS OF THE MACHINE,
DISCONNECT THE MACHINE FROM POWER SUPPLY.
6.1 INVERTER T1 # EAA0358G49A: CHECK AND REPLACEMENT
 : 1h
 : Voltmeter, small and medium cross screwdrivers, 8mm tube type key, pliers.
 : Defective inverter may cause the following malfunction:
1. Centerpost motor does not turn at all.
2. Centerpost motor turns in slow speed only
3. Centerpost motor turns in high speed only.
4. Centerpost motor turns in reverse direction only.
5. Centerpost does not turn in second speed.
6. The shut off switch of the tire shop shuts off.
TO CHECK THE INVERTER:
 Turn the machine on.
 Press the rotational pedal: if the motor does not run or if the tire shop shut off switch shuts off, the inverter must
be replaced.
IMPORTANT! BEFORE REPLACING THE EMC INVERTER MAKE SURE THAT THE TURNTABLE MOTOR
AND WIRE ARE FINE.
TO REPLACE THE INVERTER:
 Turn the machine off.
 Open the electric box.

 Disconnect the wires and the connectors from the inverter terminals
marking the position.
 Remove the two screws and take the inverter out.
 Mount the new inverter.
 Connect all wires to the terminals following the correct order.
 Close the electric box.
 Check if the machine works fine.