DIAGNOSTIC PROCEDURE FOR CONTROL BOX OF KAMA EV 996

TOOLS NEEDED: VOLTMETER

1) Remove back cover of control box and terminal block cover from motor housing

2) Check Input Voltage

3) Check Continuity of  Fuses F1, F2 F3 using the tester

4) Confirm 24V AC on terminals 7-8 of the PC Board, corresponding to wires 7 & 8 (this power comes from the 24V transformer)

5) Check Handle Switch for Continuity

6) Check Continuity of the thermal overload protection (red wires at motor terminal block)

7) After these inspections if no fault is found, the Contactor K1 should activate when the

machine is turned on.  Check voltage (110-220) across terminals 2-4-6 of K1

8) Next, test voltage across terminals in the speed switch:

Separate Winding Switch should have

In Slow Speed Position, Voltage across terminals U–V–W and no voltage across Z–X-Y

In Fast Speed Position, Voltage across terminals Z–X-Y and no voltage across U–V–W

Single Winding Switch

In Slow Speed Position, Voltage across terminals U–V–W and no voltage across Z–X-Y

In Fast Speed Position, Voltage across terminals Z–X-Y and continuity across U–V–W

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