31
ENGLISH
MASTERYS
BC 60-80 kVA - Ref.: IOMMASBCXX06-EN 06
ENGLISH
8. TROUBLESHOOTING
The alarm messages displayed enable immediate diagnosis.
Alarms are divided into two categories:
• alarms related to the UPS external circuits, (input mains, output mains, temperature and environment).
• alarms related to the UPS internal circuits. In this case, corrective actions will be carried out by the After Sales Department.
8.1. SYSTEM
ALARMS
• A02: OUT OVERLOAD
The power required by the loads is higher than the power available.
Check that the load is well balanced on the three phases by checking the measurements on the display. If necessary disconnect
any loads that do not need uninterruptible power.
Important!
The accepted overload time limit is defined in the technical specifications. When this time limit is exceeded the
loads will no longer be powered by the inverter.
• A06: VAUX OUT OF TOL
The auxiliary mains supply exceeds the acceptable tolerance values. Possible causes are:
- No voltage or frequency present or voltage and frequency outside acceptable values (see the technical specifications).
- The frequency is subject to continuous variations (typical with power supplied from an incorrectly sized GE).
• A07: OVER TEMPERATURE
The technical plant temperature is higher than the maximum value recommended.
Check the ventilation or air conditioning system in the UPS room.
• A08: MAINTEN. BYPASS
The output disconnecting switch Q3 is in position 2 (maintenance bypass). The load is therefore powered directly by mains power supply.
• A17: IMPROPER USE
This alarm does not indicate a malfunction or failure of the UPS, but an incorrect use/sizing of the system. It is activated in the event of:
- Operation for long periods at high temperatures (battery deterioration)
- High number of overloads (wrong sizing)
- Continuous battery discharging (mains not stable)
- High number of switches onto the bypass (high impulsive loads).
• A22: MAINS OUT OF TOL
The input mains is not present or not sufficient (voltage and/or frequency values incorrect with reference to the technical data); if
there is no input mains outage check that no protection devices upstream of the UPS have tripped.
Check the voltage applied and frequency values are in compliance with the values set on the mimic panel.
• A38, A39, A40, A41: EXTERNAL ALARM 1, 2, 3, 4
One of the ADC card inputs has been activated; check the status of the devices connected to this card.
• A61: PHASE ROT. FAULT
The phase cycle sequence is incorrect. In this case invert two phases of the input mains. For a UPS with separate auxiliary mains
exchange the two phases of the auxiliary mains only.
