ETA Systems SM5505 - Manual (Page 30)

Conditioned Power Center 30
Section 8 - Troubleshooting/Maintenance
8.1 Conditions Requiring Troubleshooting
Four conditions may occur, which require operators or service personnel to troubleshoot the function of the power
conditioner. Each may be individually evaluated. These four occurrences include:
1. Source circuit breaker (at switchgear or distribution panelboard) trips out
2. Front panel circuit breaker trips out
3. TVSS Fault LED (one or more) illuminate
4. Harmonic filter circuit breaker trips out (if equipped with harmonic filter option)
8.1.1 Source Circuit Breaker Trip
The power conditioner utilizes a low-impedance isolation transformer. When first energized, transformers of this
kind typically exhibit a high "inrush" current that may approach 10-15 times the nominal rating. While inrush
currents quickly decay to nominal, it is possible to occasionally experience "nuisance" tripping of the source
circuit breaker. If this occurs, consult the manufacturer for direct assistance in troubleshooting this condition.
8.1.2 Input Circuit Breaker Trips
In the event the front panel breaker on the power conditioner trips out, one of five conditions is likely at fault. You
may effectively troubleshoot this condition by checking each of the following five areas. They are listed in order
or probability.
8.1.2.1 Electrical Load Has Exceeded Capacity - If the amount of electrical load has exceeded the
capacity of the power conditioner, the front panel circuit breaker is designed to trip. Load may exceed capacity
as a result of a short circuit in the load or too much load having been added to the power conditioner. In either
event, turn off all load power switches and recycle power to the conditioner by turning the circuit breaker handle
to the extreme counter-clockwise position and then rotating back to the clockwise “On” position. If this restores
the power conditioner to normal operation (with no loads powered up) it will be necessary to either remove load
from the conditioner or troubleshoot the load to determine if a short circuit condition exists.
8.1.2.2 Phase Loss or Low Voltage Occurrence - This condition will cause the front panel circuit
breaker to trip only if the power conditioner is equipped with the power management option. To troubleshoot this
condition, rotate the circuit breaker handle to the extreme counter-clockwise position and then rotate clockwise to
the “On” position. If the phase loss/low voltage condition was temporary the power conditioner will once again be
operating and the 7500 ION monitor can be used to retrieve the phase loss or low voltage data from the log files.
If after resetting the circuit breaker it immediately trips out once again, this is an indication that the phase loss or
low voltage condition is still present. If a phase loss or low voltage is found not to exist consult the following
sections for information on further troubleshooting on additional failure conditions.