TS_600_00 PW1000 1-3kVA User Manual 6/4/17
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6: Troubleshooting
6.4
Troubleshooting an operational problem
6.5
UPS Fault handling
ON INVERTER overload
The UPS is equipped with an electronic overload protection feature which switches the load to the bypass line after 30
seconds if the UPS load rises to between 105% ~ 120% of its rated capacity. This is reduced to 10 seconds for loads
between 121% ~ 150%, with an instant transfer taking place for loads greater than 150%.
If the load transfer is due to starting a load with a high inrush current, the overload will be short-lived, and once the current
being drawn from the bypass falls below <105% of rated load, the UPS will switch back to inverter mode automatically.
If the UPS appears to be repeatedly momentarily overloading, it could be due to the inrush currents being produced as
various multiple loads are started.
ON BATTERY overload
When operating
ON
BATTERY
, the UPS overload characteristics are identical to when operating
ON
INVERTER
. The
difference is that, due to the lack of bypass supply, the UPS is unable to transfer the load to bypass if the load capacity/
time characteristic is exceeded, so the UPS will shut down.
Site wiring/earth fault:
1. Check that the utility AC source ‘L’ & ‘N’ have been wired correctly.
2. Check that the earth/ neutral voltage does not exceed the limits specified in chapter 8.
3. Seek advice from your local service agent if you find no problem with the above.
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Fan error:
1. Verify that the ventilating fans are functioning properly.
2. Contact your local service agent for fan replacement. Do not attempt to replace them yourself.
Other
For all other error codes, seek advice from your local service agent.
Symptom
Possible Solution
UPS fails to provide battery back-up, or the back-up time
is shorter than its specified performance.
1. Charge the battery for eight hours.
2. If the back-up time remains unsatisfactory after 8 hours of charging,
please contact your local service agent for battery replacement.
UPS operation appears to be normal but there is no
output to load.
1. Check that all output power cords are connected correctly.
2. If the problem is with one of the programmable outlets, seek service
support who will check the programmable outlets settings and recalibrate
them if necessary.
3. If the problem persists, seek advice from your local service agent.
The UPS switches to battery mode then back to on-line
mode, when the connected device is turned on.
Or, the UPS switches back and forth between battery
and on-line mode.
1. Check for a faulty UPS input cable or utility supply wall receptacle and
replace/repair any faulty item found.
2. If the problem persists, seek advice from your local service agent.
Strange noise and/or odour emitted by UPS
1. Shut down the UPS system immediately.
2. Turn off the utility mains supply.
3. Seek advice from your local service agent.
Buzzer Code
Possible Solution
?
Wiring Fault
