P83862 M
Sheet 21 of 23
4.0 TROUBLESHOOTING
WARNING: THE PS-12/24-8 POWER
PATH
CONTAINS VOLTAGES THAT CAN CAUSE DEATH OR SERIOUS
INJURY. ALWAYS OBSERVE PROPER ELECTRICAL SAFETY PRECAUTIONS AND WARNINGS.
Always follow good troubleshooting procedures:
•
When trouble occurs, observe all visual indications and note them.
•
If the problem is obvious or it can be located on the Troubleshooting Table, note it.
•
Always de-energize the
POWER
PATH completely (Remove both AC and DC power) before making changes to switch
settings or repairs.
NOTE:
Changes in switch settings will not take affect until all power is removed and then restored to the
POWER
PATH.
•
While the
POWER
PATH is de-energized, perform a visual and hands on check of all terminals and wires to ensure proper
termination.
Table 4: Troubleshooting
Trouble Cause
Action
INP1, INP2 LED’s do not light in
ALARM
No input signal on terminals
IN1+IN1-, IN2+IN2-
Check input and input wiring.
INP1, INP2 LED’s Flashing
Trouble on input
Check input supervision Voltage.
Check input EOLR.
OUT1,OUT2,OUT3,OUT4 LED’s
do not light in ALARM
No output
Check INPUT SELECT DIP Switch on
corresponding OUTPUT DIP Switch.
FAULT LED Flashing
INP1 INP2 trouble
OUT1,OUT2,OUT3,OUT4
Trouble
C “FAULT” NC terminals
OPEN
Check inputs. (If LED’s INP1 or INP2
flashing.)
Check outputs (if LED’s OUT1, OUT2,
OUT3, OUT4 flashing).
Check circuit connected to C “FAULT”
NC terminals.
AC LED OFF
No AC power input
Check AC Power Source.
DC LED OFF
No DC output
Check wiring to the battery.
Check wiring to AC power source.
AC FAIL relay energizes
(indication in remote location)
No AC power
Check AC power source.
No audible output in WHEELOCK
SYNC MODE
No input to IN2+,IN2-
See Example 13 and 14 for proper
input connections.
Horn, horn strobes, or strobes do
not synchronize
Improper MODE selection
Improper appliances
Check MODE selection.
Check appliances to ensure proper type
for synchronization. For IN>OUT
MODE check input appliance (DSM,
SM or PS-12/24-8).
CLASS “A” circuit is not
functioning properly
Improper MODE selection or
SW1/SW2 setting
Check to be certain MODE selection is
identical for each CLASS “A” output
circuit. CLASS “A” OUT1 uses outputs
1 and 3. Class “A” OUT2 uses outputs
2 and 4.
Check SW1 and SW2 on Logic Board
for “CLOSED” position.
CLASS “B” circuit is not
functioning properly
Improper MODE selection or
SW1/SW2 setting
Check for proper MODE selection.
Check SW1 and SW2 on Logic Board
for “OPEN” position.
BAT FAIL relay does not change
state within 5 minutes.
Power Supply voltage
improperly set.
Set Potentiometer on Power Supply
Board to 28.0VDC for 24VDC
applications and 14.0VDC for 12VDC
applications.
