Hofmann ATC 900, Руководство по обслуживанию

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CTC-CEN Service Manual 07-13 Rev.E
14

Check wires continuity from power supply plug to main switch wires terminals.
IMPORTANT! TO CHECK GROUND (YELLOW/GREEN) WIRE, DISCONNECT THE WIRE END FROM THE
TERMINAL BLOCK.
TO REPLACE THE CABLE:

Disconnect the power supply wires from the plug and switch teminals.

Disconnect the ground wire from terminal block.

Release cable strain relief from the inverter box.

Remove plug from cord and take the defective cable away.

Insert the new cable through the strain relief.
IMPORTANT! USE ONLY APPROVED CABLES, PLUGS. GROUND WIRE MUST BE LONGER THAN THE
OTHER ONES.

Fix new faston on inside cable ends and connect them to the switch terminals and to the plug.

Fix the main switch to the electronic box.

Install the disc.

Mount again the switch knob and cover of the screw.

Connect the ground wire to ground terminal block.

Install plug.

Tighten strain relief FIRMLY .

Plug the machine to the wall.

Check if the machine works fine.

Fix the inverter box again to the cabinet.
5.2 MAIN ROTARY SWITCH Q1 # 2-15359A: CHECK AND REPLACEMENT

: 0,5h

: Allen keys of 3 and 5mm, small and medium screwdriver, medium cross screwdriver, faston pliers, scissors,
pliers, multimeter

: Defective main switch may cause the following malfunction:
1. Turning the switch on the machine does not run at all.
2. Turning the machine on the building main switch shuts off.
TO CHECK THE SWITCH:

Disconnect power supply.

Remove the switch from the electronic box

5.1


Disconnect all wires from the main switch and remove it with a
screwdriver.

Turn switch to “Off”. Check that there is no continuity (
Ω
=infinity)
between any terminals 1,2,3 and 4.

Turn switch to “On”. Check that there is continuity between
terminals 1-2 and 3-4 (
Ω
= 0 ~ 0,3) and discontinuity between terminals
1-3 and 1-4, as well as 2-3 and 2-4

If there is continuity the switch is in short circuit. It must be replaced.