CEBORA S.p.A.
10
3.302.155
22/01/04
Correct?
Correct?
CONTROL BOARD (42) POWER SUPPLY TEST.
q
Control board (42), connector J1, terminals 1 - 2 = approximately 28 Vac.
YES
NO
♦
Check the wiring between service transformer (44) and control board (42).
♦
Check the wiring between contactor (47), switches (50) or (51), voltage change
terminal board (29) (where present) and service transformer (44).
♦
(arts. 575, 591, 593) Make sure the setting of the voltage change terminal board
(29) matches the mains voltage.
♦
Make sure the fuse is intact at the secondary service transformer circuit (44). If
interrupted, replace and check the resistance between terminals 1 and 2 of J7 on
control board (42). Correct value = >Mohm in both measurement directions. If
incorrect, also replace control board (42).
♦
Make sure the fuse is intact on the primary circuit of the service transformer (44).
If interrupted, replace and check the resistance of the primary winding.
Correct values:
terminals 0 – 230V = approximately 10 ohm, (arts. 574, 575);
approximately 6 ohm, (arts. 591, 593);
terminals 0 – 440V = approximately 18 ohm, (arts. 574, 575);
approximately 11 ohm, (arts. 591, 593).
♦
Check the efficiency of the switches (50) and (51) (see contact table in the
electrical diagram of par. 5).
♦
Replace the service transformer (44).
♦
Replace the control board (42).
3.3.2
- Power source powered, led (B) lit, fan (26) stopped.
FAN (26) TEST.
q
Terminals of fan (26) = approximately 230 Vac, with mains at either 230 Vac or 400 Vac.
NO
YES
♦
Check the wiring between fan (26) and terminal board on service transformer
(44).
♦
Make sure that there are no mechanical impediments blocking the fan.
♦
Replace the fan (26).
♦
Make sure the fuse on the power supply for fan (26) is intact, located on the terminal board of
the service transformer (44). If interrupted, replace and check the resistance between the
terminals of the fan (26).
Correct values = approximately 500 ohm, (arts 574, 575);
approximately 60 ohm, (arts. 591, 593).
If incorrect, also replace fan (26).
♦
Replace service transformer (44).
