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L-828 CCRs LC-Type (4, 7.5, and 10 kW/6.6 A/60 Hz)
3. General Troubleshooting
Procedures
Problem
1. Regulator not
turning on using
switch S1
2. Regulator does not
turn on using
remote control but
operates using local
control switch S1
2002 Siemens Airfield Solutions, Incorporated
All rights reserved
This subsection provides general troubleshooting procedures.
Possible Cause
Circuit breaker tripped
Control PCB
TB2 signals not working
CCI wiring not connected to TB2
terminal 8 for 120 Vac remote
control signal
LEDs for 5-Step CCR or LEDs 1 and 3
for a 3-Step not lit
96A0104B
Issued 6/02
Troubleshooting
Corrective Action
Turn off CCR using local control switch
S1. Then turn on the CCR. Verify that
nothing happens and that green LED
labeled REGULATOR ON is unlit. If these
conditions hold, then the circuit breaker
CB1 is tripped. Reset CB1 by switching on
breaker. If CB1 trips again, check and
replace fuses F1 and F2.
Use an AC voltmeter to probe signals.
Connect black lead on meter (common)
to earth ground lug on CCR.
Probe J3 terminals 4 and 6. Each should
read approximately 60 Vac. If they don't
read 60 Vac, replace transformer T3.
Use an AC voltmeter to probe J3
terminals 1 and 3. Each should read
approximately 18 Vac. If they don't read
18 Vac, replace transformer T4.
If J3 terminals 1 and 3 have normal
readings, the replace Control PCB, ribbon
cable, or Switch PCB, in that order.
Test signals to remote control TB2. If TB2
signals do not work, repair external
remote control switch or wiring.
Check CCR wiring and replace fuse F3 on
the panel with a new ¼-amp slow-blow
fuse.
Replace PCB.
Check SCRs and wiring.
Replace SCR.
Continued on next page
Page 6-3
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Troubleshooting
