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Vertiv / Inverter Systems (DC/AC)

Liebert UF-LTS32-1P Equipment information & support

The Vertiv Liebert LTS 32A (UF-LTS32-1P) is a high-speed 1U rackmount single-phase static transfer switch rated at 32A delivering seamless power transfer (<6ms) between two independent AC sources for single-corded IT equipment.

Equipment information

Brand
Vertiv
Equipment model
Liebert UF-LTS32-1P
Equipment type
Inverter Systems (DC/AC)
Controller / software version
Confirm against the installed equipment
View full product specifications
Liebert UF-LTS32-1P Official Product View 1

Information below comes from the current product catalogue. Confirm the controller, software version and configuration of the installed equipment separately.

Rated Switching Current
32 A
Rated DC Operating Voltage
220 / 230 / 240 VAC
Transfer Time
< 6 (ultra-fast seamless transfer) ms
Input Channels
Dual independent AC utility / UPS power inputs with redundant mutual backup
Physical Form Factor
19-Inch Rackmount
Physical Dimensions
43.5 × 435 × 250 mm

Alarms & troubleshooting

SOURCE_A_FAIL / ABNORMAL
Source A LED turns Red from Green, load automatically transferred to Source B
Source A utility outage, voltage sag below threshold, or supply breaker tripped
1. Verify critical load is stably supplied via Source B without interruption;\n2. Inspect Source A upstream circuit breaker and measure incoming terminal voltage;\n3. Resolve upstream power fault and re-energize Source A feed;\n4. Observe whether STS safely transfers back to priority source per settings.
SCR_FAULT / OVERTEMP
Panel FAULT Red indicator solid, continuous buzzer active
Internal silicon-controlled rectifier (SCR) element failure, driver lost, or heatsink overheating
1. Verify ventilation slots are clear and cooling airflow is unimpeded;\n2. Engage external manual bypass switch to maintain load power during servicing;\n3. De-energize both input sources to conduct safe electrical isolation inspection;\n4. Replace faulted SCR switching cartridge or contact factory support.
OVERLOAD_WARNING / HIGH_LOAD
Yellow OVERLOAD indicator solid, load current exceeds 105% of rated capacity
Connected IT equipment load exceeds rated ampacity or high inrush during server boot
1. Check actual output AC current and apparent power on the monitor;\n2. Audit recently added server power draws and redistribute non-critical loads;\n3. Stagger server power-on cycles to eliminate concurrent inrush spikes;\n4. If capacity is permanently exceeded, upgrade to a higher-rated (32A) STS.

Access Complete Maintenance & Full Alarm Troubleshooting Manual

This page lists high-frequency critical alarm codes commonly encountered in field maintenance. Comprehensive manufacturer troubleshooting matrices, board-level repair guides, detailed electrical schematics, and firmware commissioning manuals are delivered alongside equipment upon formal project procurement, accompanied by dedicated FAE technical support.

Contact Account Manager for Full Manual

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