Emerson Remote Monitoring Panel user manual Condition is no longer true

Page 21

Operation

Table 13

RMP messages (continued)

 

 

 

Message

 

Description / Suggested Action (if any)

 

 

This alarm is triggered by an inverter software routine when the inverter and bypass waveforms

 

 

are misaligned by more than 6 degrees in phase. This alarm resets automatically once the

 

 

condition is no longer true.

Inverter Asynchronous

1. First check if the alarm “Bypass unable to trace” or “Bypass abnormal” occurs. If so, solve it

 

 

first.

 

 

2. Verify the waveform of the bypass voltage. If it is too distorted, ask the customer to verify and

 

 

seek any possible measurements.

Inverter Fault

Inverter output voltage beyond limits. Load transfers to bypass.

 

 

 

 

 

The temperature of the inverter heat sink is too high to keep inverter running.

 

 

This alarm is triggered by the signal from a temperature monitoring thermostat on the inverter

 

 

bridge heat sink.

 

 

The UPS will recover automatically after a 5 minute delay from the disappearance of the

Inverter Overtemp.

overtemperature signal.

If the overtemperature condition is true, then check for and verify:

 

 

 

 

1. high ambient air temperature.

 

 

2. blocked cooling airway.

 

 

3. any fan failure.

 

 

4. prolonged inverter overload

Fan Fault

 

At least one of the cooling fans has failed

 

 

 

Inverter STS Fail

At least one of the static switches of inverter side is open or short circuit. This fault is locked until

power off.

 

 

Bypass STS Fail

At least one of the static switches of bypass side is open or short circuit. This fault is locked until

power off

 

 

Operation Invalid

This record is registered following an incorrect operation:

 

 

Output Fuse Fail

At least one of the inverter output fuses is blown. Inverter shuts down. Load transfers to bypass.

 

 

Control Power 2 Fail

UPS operates but Redundant Control Power is not available.

 

 

 

 

 

The UPS is confirmed to be overload when the load arises above 105% nominal rating.

 

 

The alarm automatically resets once the overload condition is removed.

 

 

1. Confirm that the alarm is true by checking the load percent indicated on the LCD panel to

Unit Over load

determine which phase is being overloaded.

 

 

2. If the alarm is true, measure the actual output current to verify that the indications are valid.

 

 

Disconnect unnecessary load and ensure the safety. In a parallel system, a severe load sharing

 

 

error can also leads to the alarm.

 

 

The UPS parallel system is confirmed to overload when the total load arises above 105%

 

 

nominal rating for the set basic number of UPSs. The alarm automatically resets once the

 

 

overload condition is removed.

System Over load

1. Confirm that the alarm is true by checking the system load percent indicated on the LCD

panel to determine which phase is being overloaded.

 

 

 

 

2. If the alarm is true, measure the actual output current to verify that the indications are valid.

 

 

Disconnect unnecessary load and ensure the safety. In a parallel system, a severe load sharing

 

 

error can also leads to the alarm.

 

 

The UPS is confirmed to overload and the overload times out.

 

 

Note 1: the highest loaded phase will indicate overload timing-out first.

 

 

Note 2: When the timer is active then alarm “unit overload” should also be active as the load is

 

 

above nominal.

 

 

Note 3: When the timer has expired, the inverter Static Switch is opened and the load

Unit Over load Timeout

transferred to bypass. The inverter shutdown and will restart after 10 seconds.

 

 

Note 4: If the load decreases lower than 95% after 5 minutes, the system will transfer back to

 

 

inverter mode.

 

 

Confirm that the alarm is genuine by checking the load percent indicated on the LCD. If an

 

 

overload is indicated then check the load, and investigate any additional load connected prior to

 

 

the alarm (if applicable).

Byp. Abnormal Shutdown

Both bypass and inverter voltages unavailable. Load interruption

 

 

Inverter Over Current

Inverter Pulse Width Modulation module overloaded.

 

 

 

17

Image 21
Contents Liebert Remote Monitoring Panel Page Table of Contents Figures Information for the Protection of the Environment Introduction RMP component location in Figure UPS Room Maintenance or Control Room15.6mm 14mm Cable Specifications Power SupplyCommunication cable specifications Preliminary checksUPSU2J24 Mounting the RMP on DrywallElectrical connections Power and communication cable routingCommunication connections On Remote Monitoring Panel board RS-485 cable connection to Liebert NXOpening screen Startup and ResetSilence On/Off screens UPS and RMP firmware are compatible screenCommunication with UPS failed Audible Alarms-Buzzer LED Mimic Power FlowLCD Monitor and Menu Keys Menu key Icons and their meaningKey Help Window Type Stop Freshening Charge Freshening ChargeUPS system window Detailed Description of Menu ItemsDescriptions of RMP menus and data window items Menu Type Item Type ExplanationCurrent Record Window Status and Event Messages RMP messagesMessage Description / Suggested Action if any Condition is no longer true EPO RMP messages Prompt Popup Windows Dynamic Energy Flow Chart and UPS Help ScreenPrompt windows, meanings controlled at UPS only Prompt windows, meanings controlled at RMPHelp screen Default screen saverEnvironmental specifications Mechanical specificationsElectrical specifications Cable specificationsAgency and Certifications Electromagnetic interference EMI-emission limitsElectromagnetic susceptibility EMS-immunity levels Iti Ne tTi n Er t

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