Appendix A: Troubleshooting - Johnson Controls P2000 Hardware Installation

CKM-CE75-E1M
24-10707-112 Rev. D
T
A.
ROUBLESHOOTING
This appendix describes fault conditions, possible causes, and suggested
solutions.
Possible cause
SYS FLT LED lit and SYS FLT relay indicating a trouble condition
Battery disconnected
Earth ground fault
Low battery voltage
High battery voltage
High or low output
voltage
Blown fuse
Internal problem
Suggested Solution
Verify that the battery is connected to the CKM-FPO. Check all crimp
connections on the battery
Verify that the battery set is charged and in good
If you do not use a battery in the installation, remove the BAT DET
jumper.
This fault only displays if the EARTH GND DET jumper is ON and
the GND FLT LED is lit.
An impedance exists between earth ground and a voltage output
or DC common connection on the power supply, an accessory
board, or any connected piece of equipment. Isolate the
connection with the impedance by removing wires one at a time
until the fault clears.
Ensure that no other equipment in the system is set to detect
earth ground faults (including other power supplies in the
system). Enabling earth ground detection on more than one
piece of equipment in a system causes a conflict and may cause
one or all pieces of equipment in the system to display an earth
ground fault.
The battery is discharged or damaged. Allow the battery to
charge or replace the battery.
The battery set is incorrect. Ensure the battery set is configured
properly for the output voltage
Measure the output voltage at the DC1 terminals. The voltage
should be 12.5 V for the 12 V setting or 25 V for the 24 V setting
(±10%). Contact the manufacturer if the voltage is outside of this
range.
Check the DC1 and Battery fuses.
Verify the integrity of the output wiring and powered devices
before replacing any ruptured fuses. Replace fuses only with the
same type and rating.
the manufacturer.
Contact
A-1
leads.
condition.
setting.
Troubleshooting