Troubleshooting

Table 5-1: Main Module and Electronics Modules M1-M4 Active Alarms continued

LCD Display

Possible Cause

Suggested Action

x Alarms

The UPS detects that one or more of

Contact Technical Support for

 

the internal module fuses has failed.

assistance.

Fuse Failure

 

 

 

 

 

x Alarms

An electronics module detects a

Check the ventilation grills for

 

heatsink over temperature condition.

blockage. If the grills are blocked,

Heatsink Over

The detecting module immediately

remove blockage, switch to

Temperature

shuts down to protect its heat sensitive

Maintenance Bypass mode, and restart

 

 

components.

the system. Verify that the ambient

 

 

temperature is less than 40°C (104°F).

 

 

If the grills are not blocked and the

 

 

problem persists, contact Technical

 

 

Support for assistance.

 

 

 

x Alarms

The UPS detects that the input utility

If this occurs in a running system, the

 

voltage is above the maximum

system will immediately transition to

Input AC Over

operating range of about 277 v

Battery mode until valid utility returns. If

Voltage

(288 v -hysteresis).

this occurs before a system has

 

 

 

entered an online state, its startup

 

 

sequence will not complete, and the

 

 

system will shut down until valid utility

 

 

returns.

 

 

If the condition persists, contact an

 

 

electrician.

 

 

 

x Alarms

The UPS detects that the input utility

If this occurs in a running system, the

 

voltage is below the minimum operating

system will immediately transition to

Input AC Under

range of about 172 v

Battery mode until valid utility returns. If

Voltage

(160 v + hysteresis).

this occurs before a system has

 

 

 

entered an online state, its startup

 

 

sequence will not complete, and the

 

 

system will shut down until valid utility

 

 

returns.

 

 

If the condition persists, contact an

 

 

electrician.

 

 

 

x Alarms

The UPS detects that the input

If this occurs in a running system, the

 

frequency has a greater deviation than

system will regulate output frequency to

Input Under Or

± 5 Hz from the nominal window of

its nominal 50 or 60 Hz. If this occurs

Over Frequency

operation.

before a system has entered an online

 

 

 

state, its startup sequence will not

 

 

complete, and the system will shut

 

 

down until valid utility returns.

 

 

If the condition persists, contact an

 

 

electrician.

 

 

 

 

 

continued

5-4

HP Uninterruptible Power System R12000 XR Models User Guide