Table 5-3. Remote Control Module Troubleshooting
TEST OR INSPECTION
3. AUDIBLE ALARM (HORN) DOES NOT SOUND DURING FAULT CONDITION.
Step 1. Toggle ANNUNCIATOR RESET switch to RESET position.
If audible alarm (horn) still does not sound, check for 24 V DC (using multimeter) across 1 and 2 contacts of
audible alarm Al (13, figure 5-2). If voltage is present, test Al (refer to paragraph 5-9b(3).
If voltage is absent, proceed to next step.
Step 2. Using a multimeter, inspect for 24V DC across coil of relay K26.
If absent, proceed to next step. If present, inspect for 24V DC across contacts of K26. If this reading is zero
volts, proceed to check and replace relay K25 (refer to next higher level of maintenance).
If this reading is 24V DC, inspect relay K26 (2, figure 5-3) and if replacement is required, refer to next higher
level of maintenance.
Step 3. Using a multimeter, check for 24V DC across contacts 4 and 5 of ANNUNCIATOR TEST switch S13.
If voltage reading is zero, refer malfunction to next higher level of maintenance; specifically, the diodes
associated with the energized fault circuit.
If voltage reading is 24V DC, set 24V DC CONTROL CIRCUIT BREAKER to OFF and check S13 for
continuity as it is switched to its various positions. If replacement is required, refer to paragraph 5-9.
4. HERTZ METER READS INCORRECTLY.
Using a multimeter, note voltage at pins 1 and 2 on frequency converter A103 on generator control panel.
Again, using multimeter check voltage at pins 1 and 2 of frequency converter A103 on remote control
If readings are the same, replace HERTZ meter M103 (refer to paragraph 5-9). If readings are
not the same, refer replacement of A103 to next higher level of maintenance.