24/7 emergency UPS repair in Toronto and the GTA

The first ten minutes

While you wait for the technician, these steps protect the load and the evidence.

1. Read the front panel. Write down the alarm codes, the messages and whether the UPS shows “on bypass”, “on battery” or “fault”. A photo of the display is enough.
2. Do not clear alarms or restart repeatedly. The event log is how the cause is found. Restarting a UPS that tripped on a fault can repeat the fault.
3. Check the input. If the building power is down, the UPS is doing its job: note when the outage started, because runtime is limited.
4. Leave the battery cabinet closed. A swollen, hot or leaking battery is a hazard. Keep people away and tell us when you call.
5. Know your bypass. If the UPS is on static bypass, the load is on raw utility power with no battery protection. Avoid switching it yourself unless your site procedure covers it.
6. Have the details ready: make, model, serial number, site address, access contact and what the load is.

What we need when you call

• The UPS make, model and serial number (rating plate on the front or rear)
• The alarm codes or messages and when they started
• Whether the load is on the UPS, on bypass or down
• Site access: who meets the technician, parking, security clearance
• Any recent work: battery replacement, electrical changes, a power event

What happens on site

The technician reads the event log and alarm history, checks the input, output and bypass, measures the battery string and inspects fans, capacitors and connections. Where the fault is clear and the part is on hand, the repair is made on the first visit; where a part has to be ordered, the UPS is left in the safest state your site allows, usually on maintenance bypass with the load supported, and you get the part lead time in writing.

You receive a written report: the fault found, the cause where it can be established, what was replaced, the readings taken and what to plan next.

Common causes of UPS failures

• Batteries at end of life. A frequent reason a UPS drops its load during an outage. See UPS battery replacement.
• Fans and capacitors. Wear parts with manufacturer replacement intervals: Eaton, for example, recommends replacing power-train capacitors around 7 years of operation ¹, with the fans at the same time ².
• Input power events. Surges, sags and generator transfers can trip a UPS to bypass.
• Overload. Added equipment pushes the load past the UPS rating and forces a transfer to bypass.
• Heat. A hot UPS room shortens battery life ³ and stresses electronics. See precision cooling maintenance.