EnForcer™ SCR Service Manual I.B. 1561
25
SUBSEQUENT FAULT INDICATION
If the main processor locks-up again before the next control board power-down, LED2 will flash as shown below.
LED2 state Main Processor
ON steady No lock-ups or failures since last power-up.
Flash every 4 seconds 1 lock-up since last power-up.
Flash every 2 seconds 2 lock-ups since last power-up.
Flash every 1 second 3 lock-ups since last power-up
Flash every ½ second 4 or more lock-ups since last power-up.
If the main processor locks-up more than four (4) times, LED2 will remain flashing every ½ second.
FAULT RECOVERY
The Reset Watchdog is reset by cycling power to the control board. After power-up, the Reset Watchdog will resume
normal operation and will light steadily after the two minute time-out.
TESTING COMPONENTS
The following information applies to all charger types, unless otherwise noted.
TRANSFORMER
Please follow these steps before testing the Transformer:
Disconnect the battery.
Remove the charger cover.
Connect the charger to AC power.
First Transformer Test
You will be testing the transformer’s windings (with a good quality meter) to check the transformer’s voltages.
Your measurements should be within 10% of what is listed on the nameplate.
Second Transformer Test (120V Test)
Be sure to disconnect the transformer from SCR/Diode Block, PC board, and control transformer primary. You will need
to have the transformer isolated for this test.
1) Use a line cord with a 3 to 5 amp slow-blow fuse in an in-line fuse holder.
2) Power each section separately. Power from TB #1 and #6, and jumper leads 3 and 4.
3) If a fuse has opened, there might be a winding problem in the transformer. Perform all other tests in this
section before replacing the transformer.
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