5.5 Troubleshooting
The code produced by the illuminated indicator LEDs corresponds to a trouble occurring on the system. See Table 20 for the IDNet LED
definitions, and see Table 21 for the AUTOPULSE Z-20 trouble messages.
Table 20: AUTOPULSE Z-20 system indicator LEDs
Comm trouble Normally off. Turns on steady if the IDNet is not communicating with the FACP CPU.
IDNet trouble Normally off. Illuminates to indicate a problem with the IDNet channel:
• Channel failure.
• Line short.
• Class A failure or an open line.
Earth fault+ Illuminates to indicate a positive earth fault.
Earth fault - Illuminates to indicate a negative earth fault.
IDNet LEDs: A, B, and C Steady ON: Indicates an open or short condition on indicated loop.
Figure 25: LEDs on the power supply
Table 21: AUTOPULSE Z-20 system trouble messages
Message Definition
AC Fail AC power is not present or is too low for proper system operation.
Low Battery The battery voltage is below the 22.8 V nominal level by 10% or more.
Depleted/Missing Battery The battery is either below 19.4 V or completely undetected.
Card Overcurrent The module is drawing more current than it should. Check for faults on the circuit.
Charger trouble The battery charger is either defective or being heavily loaded by batteries. Read charger current at front
panel, if charger current is approximately 1.4 A, batteries are likely loading the charger. Remove battery
connection and measure the output. If the output is 27.6 (or close, temperature dependent), there is a
possibility of depleted batteries or a bad set of batteries. Allow batteries to charge or replace them if they
do not take a charge.
If the current is ~1.4 A with batteries and charger voltage below 20 V, remove the batteries and recheck the
charger voltage. If the voltage is around ~27.3 V, then the batteries are heavily depleted.
Extra Device Appears if one or more extra devices (i.e., devices that have not been configured for the IDNet channel) are
on the system. Only one message appears, regardless of the number of extra devices found.
Earth Fault Search Appears during the Earth Fault Search diagnostic function. Once the search is initiated, the front panel
display indicates how far along the search process has progressed (10%, 25%…75%), and then shows
the results of the search. The result either identifies the offending circuit or indicates that the earth fault
could not be found. During the search of circuits (IDNet, NAC, and aux power), system alarm and trouble
processing is suspended.
Positive Earth Appears when a positive earth fault is detected.
Negative Earth Appears when a negative earth fault is detected.
Short Circuit Appears when a short is detected on the IDNet channel. This status clears automatically when the short
circuit is removed.
Channel Fail Appears when each device on the IDNet channel has been configured, and when none of the devices are
communicating on the channel.
page 31 579-1102AR Rev C
Z-20 Agent Releasing Panel Installation Manual
To Next Page
Loading...
Need help?
General
