This article is designed to assist you with preliminary diagnosis of an Eaton 93PM UPS. If you require support, call or email us immediately.
Eaton 93PM Maintenance and Faults
An Eaton 93PM UPS requires preventative maintenance for optimal operation and to minimise faults and damage to components. To access the UPS menus a password can be entered by pressing the padlock icon in the top right corner of the screen.
Eaton 93PM Default Password User Level 1 – 1111 – Access the Controls screen from the home screen
Able to command the UPS to Normal mode, Static Bypass mode, and Load off. Be careful in a parallel system that you select the System tab to control the entire system and the UPS tab to control the individual UPS. Also able to enable/disable ESS mode and VMMS mode if configured, and reset sticky alarms from the EAA Controls tab.
Eaton 93PM Default Password Configuration Level 2 – 0101 – Access the Configuration tab in the settings menu
Able to change non critical settings in the UPS including time/date, signal inputs (function, polarity), relay outputs (alarm configuration, relay testing), battery test settings (not able to command a battery test to start on demand), redundancy alarm level.
Eaton 93PM Default Password Service Level 3 – This password is a dynamic password that constantly changes and an Eaton representative is required to access the service settings
Configuration of the number of battery cells, number of battery strings, battery autonomy calculation values, and battery charge current limit. Output voltage and frequency setting. Auto restart function, site wiring alarms, and UPS parallel configuration is all done in the service settings tab.
System Status
The four LED lights at the bottom of the LCD screen will give you a quick description of the current status of the UPS.
The Green Sine Wave LED is illuminated when the UPS is on normal mode and typically will protect the load from power outages given no other faults are present
The Yellow Battery LED is illuminated when the input supply to the UPS is lost or out of tolerance and the UPS is drawing power from the batteries to support the load
The Orange Bypass LED is illuminated when the UPS is on internal static bypass mode. The UPS may be in bypass due to a command from the user or due to an internal fault in the UPS power train. Load is supplied directly via the UPS input supply and is not protected from outages and other electricity faults.
The Red Alarm LED is illuminated when there is a fault condition on the UPS that requires attention.
A combination of these four status LEDs may also be present
The Green Sine Wave and Yellow Battery LED are almost always on simultaneously, unless the user commanded the UPS to static bypass before a power failure occurred.
The Red Alarm LED can be illuminated simultaneously with the Green Sine Wave LED if the fault does not warrant a transfer to static bypass, and can also be illuminated simultaneously with the Orange Bypass LED if the UPS is on static bypass mode with a fault present.
Alarm and Event Logs
Any alarms that are currently affecting the UPS can be viewed on the Logs > Active Events tab. if the fault has resolved itself and is not categorised as a sticky alarm, it will automatically be removed from the active events. All events are logged in the Logs > Service Logs tab, including alarms, commands, UPS operations and other non critical information.
Common UPM Alarms
24V Power Supply Failed – component replacement generally required
5V Power Supply Failed – component replacement generally required
Ambient Over Temperature – UPM temperature is high. Ensure room temperature is below 25 degrees, check adequate airflow in front and behind UPS, clear air filter and fan grill on from of UPS of any debris, check rotation of fans
Batteries Disconnected – There is no battery voltage at the UPS battery terminals, ensure all isolators and circuit breakers between batteries and UPS are closed. Could also be due to a battery or UPS fault
Battery Breaker Open – There is a signal being sent to the UPS that a battery circuit breaker is open. verify state of all battery circuit breakers and then verify configuration and polarity of respective building input signal
Battery Current Over Limit – component replacement generally required
Battery DC Over Voltage – Verify battery voltage is not greater than 14 volts per battery. If battery configuration has not been changed, component replacement may be required
Battery Startup Failure – component replacement generally required
Battery Switchgear Failed – component replacement generally required
Battery Test Failed – the automatic battery discharge test has failed because the batteries have fallen below the alarm level. This could be due to deteriorated batteries, fluctuations in load during test or misconfigured battery capacity settings.
Charger Failed – component replacement generally required
Configuration Error – critical UPS operation settings are not configured or there is a configuration mismatch between control boards. Generally not resolvable by customer
DC Link Over Voltage – component replacement generally required
DC Link Under Voltage – component replacement generally required
Fan Failed – A fan is not operating satisfactorily and replacement is required unless external impaction is identified and cleared
Fuse Failed – component replacement generally required
Input AC Over Voltage – The input supply voltage is too high for the UPS to operate (Default +20%). A decrease of the supply voltage or increase of the UPS operating voltage is required
Input AC Under Voltage – The input supply voltage is too low for the UPS to operate (Default -15%). An increase of the supply voltage or decrease of the UPS operating voltage is required. This may also be present during a power outage.
Input Under/Over Frequency – The input supply frequency is out of tolerance and the UPS cannot operate. This may be present during a power outage.
Inverter AC Under Voltage – component replacement generally required
Inverter AC Over Voltage – component replacement generally required
Inverter Fault – component replacement generally required
Inverter Output Over Current – There is too much current being drawn from the UPS Output. Verify there is no overload present on the UPS. Component replacement may be required
Inverter Over Temperature – Inverter temperature is high. Ensure room temperature is below 25 degrees, check adequate airflow in front and behind UPS, clear air filter and fan grill on from of UPS of any debris, check rotation of fans. Inverter temperature fault can also be present when an inverter failure has occurred.
Inverter Switchgear Failed – component replacement generally required
Low Battery Shutdown – The batteries have been depleted to the low battery shutdown voltage and UPS operation has ceased to minimise damage to batteries.
Output AC Over Voltage – component replacement generally required
Output AC Under Voltage – component replacement generally required
PhaseA Overload – UPS output phase A has exceeded power limit and must be reduced. This fault can be present when faulty equipment is connected to the UPS output and also as a result of UPS inverter fault
PhaseB Overload – UPS output phase B has exceeded power limit and must be reduced. This fault can be present when faulty equipment is connected to the UPS output and also as a result of UPS inverter fault
PhaseC Overload – UPS output phase C has exceeded power limit and must be reduced. This fault can be present when faulty equipment is connected to the UPS output and also as a result of UPS inverter fault
Power Supply Failure – component replacement generally required
Precharge Failed – component replacement generally required
Rectifier Fault – component replacement generally required
Rectifier Phase Rotation – The input phase rotation must be clockwise, UPS is measuring anticlockwise. Verify with phase rotation meter
Rectifier Startup Failure – component replacement generally required
Service Battery – A battery related issue is present, such as battery voltage dropping too much during rest mode, DC polarity incorrect, ground fault present
Site Wiring Fault – There is excessive voltage between neutral and earth. If this is expected due to the application, the alarm can be disabled. In a normal installation this condition should not be present, possible causes are broken neutrals (4 pole ATS), incorrect earthing arrangement, leakage and induction
UPM EEPROM Checksum Failed – The configuration in the UPM has been corrupted, sometimes a configuration reset will resolve but typically component replacement required.
UPM Remote Emergency Power Off – An EPO signal has been sent to the UPS to shut down the system
UPM Selective Trip – component replacement generally required
UPM Software Incompatible – The firmware revisions between the UPM and the other components are not compatible and a firmware flash is required
Utility Not Available – Generally present during a power outage or input supply isolation
Common MCU Alarms
Backfeed Switchgear Failed – component replacement generally required
Bypass AC Over Voltage – The supply voltage is too high and the UPS cannot operate on static bypass mode
Bypass AC Under Voltage – The supply voltage is too low and the UPS cannot operate on static bypass mode
Bypass Not Available – The UPS is not able to use static bypass mode due to the supply voltage or frequency being out of tolerance, the inverter not being synchronised to the supply or an internal UPS fault preventing transfer. This alarm is also present when momentarily when the UPS is switched to normal mode
Bypass Phase Rotation – UPS requires clockwise phase rotation, verify with a phase rotation meter
Emergency Transfer to Bypass – The UPS has performed an emergency transfer to bypass due to an internal UPS fault or fault condition in the installation
MCU 24V Power Supply Failed – component replacement generally required
MCU 5V Power Supply Failed – component replacement generally required
MCU Configuration Error – MCU settings are missing or do not match other components in the UPS, typically not resolvable by customer
MCU EEPROM Checksum Failed – the configuration of the MCU has been corrupted, sometimes a configuration reset will resolve but typically component replacement required
MCU Software Incompatible – The firmware revisions between the MCU and the other components are not compatible and firmware flash is required
Not Enough UPMs- There are not enough functioning UPS ready to support the load
Output Voltage Abnormal – There is output voltage present when the UPS does not expect it to be, or there is no output voltage when the UPS expects there to be. This is generally due to incorrect installation or switching of a parallel system, or faulty / incorrect external bypass installation
STS Fan Failed – An STS fan is not operating sufficiently, replacement generally required unless external obstruction is identified and removed
Too Many Inverter Transfers – The UPS is locked in its current state due to too many transfers, can be locked on inverter due to unstable supply, or locked on bypass due to inverter fault
Common CSB Alarms
Battery Backup Power Failure – The SRAM button battery has deteriorated and replacement is required. This alarm is not related to the UPS battery strings
Check CSB EEPROM – component replacement generally required
CSB Software Incompatible – The firmware revisions between the CSB and the other components are not compatible and firmware flash is required
Internal Communications Failure – The CSB is not able to communicate with the MCU and UPMs. This can be due to rectifier supply being isolated and UPMs not being energised
Service Required – This alarm is typically present whenever any other major alarm is present on the UPS that may require inspection or repairs
For further assistance or to arrange a preventative maintenance contract or an emergency inspection, please enquire below or call 1300 11 44 69
ENQUIRE NOW