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MASTERYS BC 100-120 kVA - Ref.: IOMMASBCXX07-EN 05
8. TROUBLESHOOTING
The alarm messages displayed enable immediate diagnosis.
Alarms are divided into two categories:
• Alarms relating to external UPS circuits: input mains, output mains, temperature and environment.
• Alarms relating to internal UPS circuits: in this case corrective action will be carried out by the After Sales Department.
The USB report makes it possible to have full information on what occurred. Refer to 5.3.11 to download it.
Note:
the service code number in the HMI menu service and give it to the after sales service to help with diagnosis and troubleshooting.
8.1. SYSTEM ALARMS
A02: UPS OVERLOAD
The power required by the loads is higher than the power available.
Check the load is well balanced on the three phases by checking the measurements on the display. If required 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: AUXILIARY MAINS OUT OF TOLERANCE
The auxiliary mains exceeds acceptable tolerance values. Possible causes are:
• No voltage or frequency present or voltage and frequency outside acceptable values (see the technical specifi cations).
• The frequency is subjected to continuous variations (typical with power supplied from an incorrectly sized GE).
A07: INSIDE OVER TEMPERATURE
The UPS internal temperature is higher than 50 °C (please refer to the MEASUREMENTS menu on the HMI).
Check the ventilation or air conditioning system in the UPS room.
A08: MAINTENANCE BYPASS ACTIVE
The output disconnection switch Q5 is in position 1 (maintenance bypass).
The load is therefore powered directly by the mains power supply.
A17: IMPROPER USE
This alarm does not indicate a UPS malfunction or failure, but 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: INPUT MAINS OUT OF TOLERANCE
The input mains is not present or not su cient (voltage and/or frequency values incorrect with reference to the technical data. If
there is no input mains outage check if any protection upstream of the UPS has tripped.
Check that the voltage applied and frequency values comply with the values set on the HMI.
A38, A39, A40, A41: EXTERNAL ALARM 1, 2, 3, 4
One of the ADC PCB inputs has been activated. Check the status of the devices connected to this PCB.
A56, A57: GENERATOR SET GENERAL ALARM / GENERATOR SET FAULT
The generator has issued an alarm. Check the GE directly.
A61: PHASE DETECTION 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.
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