Lincoln Electric V155-S service manual Figure F.10 Plug JP1 Testpoints

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F-24	TROUBLESHOOTING & REPAIR		F-24
	INVERTER BOARD VOLTAGE TEST (CONTINUED)
	FIGURE F.10 – PLUG JP1 TESTPOINTS
	15	16
	13	14
	11	12	JP1
	9	10
	7	8
	5	6
	3	4

PIN 1 PIN 2

INPUT BOARD

AC1

AC2

DC-

DC+

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NOTE: DUE TO SAFETY REASONS AND THE PHYS- ICAL LOCATION OF THE INVERTER, IT IS NOT EASY TO PERFORM THE VOLTAGE TEST AT THE INVERTER BOARD. CHECKS CAN BE DONE AT THE INPUT BOARD CON- NECTOR JP1. See Fig. F.10.

PROCEDURE

1. Disconnect power to the INVERTEC® V155-S.

2. Perform the Case Cover Removal Procedure (left side only).

3. Connect the main 230VAC to the machine and switch ON the input switch.

4. Set the machine to STICK mode.

5. Locate the JP1 connector points. See figure F.10.

6. Using pins 8,9,16 or 15 as a common (-) ground: Check pin 1-> +15VDC means fan is ON. 0VDC means fan is OFF.

Check pin 3-> 0VDC during OCV condition. Check pin 5-> +11.6VDC means the inverter is ON (the first 5 minutes after activity) while 1.5VDC means the inverter is OFF.

Check pin 6-> value changes from 7.6 to 8.5VDC during reading when the inverter is ON. 50-60 mVDC when the inverter is OFF.

Check pin 7-> +15VDC.

Check pin 11-> +5VDC.

Check pin 12-> +5VDC (supply voltage generated on input board).

Check pin 14-> +15VDC (supply voltage generat- ed on input board).

7. Check to see if the correct microcontroller program is preset: H490000005-004X where X is the revi- sion number.

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INVERTEC® V155-S