PXL Conventional Fire Alarm Control Panel
Testing and Troubleshooting
56
TROUBLE MESSAGES
Trouble Message Text
Condition
Possible Cause
System powers up normally but
nothing shows on LCD display
Contrast not adjusted properly
AC POWER FAULT
AC power off/low
• Loss of AC mains
• AC brownout
• Blown secondary fuse
• Open transformer primary/secondary
BELL XX
NAC trouble
NAC open
NAC shorted
BELL XX BYPASSED
NAC bypassed
NAC bypassed
GROUND FAULT
Ground fault
• +24 shorted to earth ground
• -V shorted to earth ground
• F+, R+, R-, F- of an NAC shorted
to earth ground
• IDC+ or IDC- of an IDC zone
shorted to earth ground
INCORRECT PZE PIC
Firmware error for CANADA
country selection
PCM-1 and/or PZE-4B module has Rev. 1.0
firmware. Upgrade to Rev. 3.x or higher
LED MOD X MULTI/UNKN
LED-3/4 not responding and ASC
routine will not run
Two or more LED-3/4s installed with same
dipswitch address
LED-3/4 MOD X NO
RESPONSE
LED-3/4 not responding
• Module removed from system*
• Module failed
• Module address changed
LED-3/4 MOD X NOT SPEC’D
LED-3/4 responding but not in
configuration
• LED module added but system not
reconfigured
• LED module address changed
MULTI RESP LED-3/4 MOD X
Multiple Response at LED-3/4
address
• Two LED modules set to same address
• LED set to address out of range
MULTI RESP PCM MOD O
Multiple Response at PCM
address
Module failed
MULTI RESP PNC MOD X
Multiple Response at PNC
address
• Two PNC modules set to same address
• PNC set to address out of range
MULTI RESP PPS MOD X
Multiple Response at PPS
address
• Two PPS modules set to same address
• PPS set to address out of range
MULTI RESP PRM MOD X
Multiple Response at PRM
address
• Two PRM modules set to same address
• PRM set to address out of range
MULTI RESP PZE MOD X
Multiple Response at PZE
address
• Two PZE modules set to same address
• PZE set to address out of range
MULTI RESP RSA MOD X
Multiple Response at RSA
address
• Two RSA modules set to same address
• RSA set to address out of range
* Modules purposely removed from the system may be removed from the configuration using
the "Delete Module Option" in the Program menu.
X = Module number
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