Apc SYMMETRA PDUM160H-B User Manual download pdf (Page 29)

Troubleshooting: UPS Alarms

990-3015-001 Symmetra PX 160 kW 400 V Operation 23

Low Battery The UPS is in battery operation and

the battery charge is low.

No corrective action necessary.

Note: Runtime is limited. Shut down the

system and the load equipment or restore

incoming voltage.

No Batteries Detected No battery power is available. Option 1: Ensure the batteries are installed

properly.

Option 2: Check if the DC Breaker has

been tripped.

No Power Modules Detected No power modules are available. Option 1: Ensure that the power modules

are properly installed, the two fastening

screws are tight, and the locking latch is

engaged.

Option 2: Check for other communication

alarm messages.

Not Synchronized Fault System cannot synchronize to AC

line and bypass mode may not be

available.

Option 1: Decrease the sensitivity to input

frequency.

Option 2: Correct the input voltage to

provide acceptable voltage frequency.

Output Voltage Not In Range The output voltage is not within the

specified range.

Evaluate the threshold setting. If necessary,

adjust it for your situation. Contact APC

Customer Support.

Overload The load has exceeded the system

power capacity.

Option 1: Decrease the load.

Option 2: Add a power module to the

system.

Power Failure The input voltage is not acceptable

for normal operation.

Contact APC Customer Support.

Power Module Fault A power module has failed and

requires replacement.

See “How to remove a power module” on

page 17.

Redundancy Alarm Actual power module redundancy

has fallen below user-specified

redundancy alarm threshold. At least

one power module has failed or the

load has increased.

Option 1: If possible, install additional

power modules. See “How to install a

power module” on page 17.

Option 2: Replace failed modules. See

“How to replace a power distribution mod-

ule” on page 19.

Option 3: Reduce the load.

Option 4: Change alarm limit.

Redundancy Lost The UPS no longer detects

redundant power modules. One or

more power modules have failed, or

the load has increased.

Option 1: Install additional power

modules.

Option 2: Replace failed modules. See

“How to remove a power module” on

page 17.

Display Message Meaning Corrective Action

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Apc SYMMETRA PDUM160H-B User Manual Page 29

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