Lincoln Electric 355M Manuel d'utilisateur télécharger pdf (Page 91)

FAN CONTROL AND MOTOR TEST (continued)

TROUBLESHOOTING AND REPAIR

F-45 F-45

POWER WAVE 355M/405M

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Plug J20

Lead 715+

Lead 716-

7. If the 115VAC is low or not present check cir-

cuit breaker CB2 located on the front panel. If

the circuit breaker is OK, perform The

Auxiliary Transformer Test. Check plug J22,

circuit breaker CB2 and associated leads for

loose or faulty connections. See the Wiring

Diagram.

8. Energize the weld output terminals with the

PW 355M/405M in mode 200. This mode can

be accessed using a wire feeder placed in

mode 200 or a laptop computer and the appro-

priate software. Carefully check for 115VAC at

plug J22 pin-1 to J22 pin-4 (fan leads). See

Figure F.15. If the 115VAC is present and the

fan is not running then the fan motor may be

faulty. Also check the associated leads

between plug J22 and the fan motor for loose

or faulty connections. See the Wiring Diagram.

WARNING: HIGH VOLTAGE IS PRESENT AT

THE SWITCH BOARD.

9. If the 115VAC is NOT present in the previous

step then proceed to the fan control test.

FAN CONTROL TEST PROCEDURE

1. Locate plug J20 on the switch board. Do not

remove the plug from the switch board. See

Figure F.14 and F.16.

2. Energize the weld output terminals (Select

Weld Terminals ON) and carefully check for

+15VDC at plug J20 pin-6+ to J20 pin-2-

(leads 715 to 716). See Figure F.16. If the

15VDC is present and the fan is not running

then the switch board may be faulty. If the

15VDC is not present when the weld terminals

are energized then the control board may be

faulty. Also check plugs J20, J7, and all asso-

ciated leads for loose or faulty connections.

See the Wiring Diagram.

WARNING: HIGH VOLTAGE IS PRESENT AT

THE SWITCH BOARD.

3. Remove the input power to the POWER WAVE

355M/405M.

Note: The fan motor may be accessed by the

removal of the rear panel detailed in The

Current Transducer Removal and

Replacement Procedure.

4. Replace the case wrap-around cover.

FIGURE F.16 PLUG J20

1 2 ... 86 87 88 89 90 91 92 93 94 95 96 ... 136 137

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Lincoln Electric 355M Manuel d'utilisateur Page 91

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