12. Troubleshooting
If a problem occurs, check the condition of the equipment and perform countermeasures as listed in the table below.
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| ・ Internal maintenance and inspection should be performed only by |
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| technically qualified personnel. Electric shock, injury, burning, fuming or |
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| fire could otherwise result. |
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| ・ Before beginning inspection, shut down the UPS completely, and remove |
| CAUTION | the input power. Failure to do so may result in an electric shock. |
| ・ While the batteries are connected to the equipment, hazardous voltage is | |
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| present. Never touch any parts with your hand. Doing so may result in an |
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| electric shock. |
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| Condition | Countermeasure |
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・Check whether the input wiring has been performed correctly. Refer to §7 “Wiring”.
・Verify that the input voltage and input frequency are within the rated range. Refer to §15.4 “Specifications”.
No power supplied to | ・ Check that MAIN SW is set to “ON”. | |
output. | ・ | must be pressed for at least 1 second. |
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| See §9.1 “UPS Startup (Normal Operation)” for the correct startup |
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| procedure. |
| ・ The bypass fuse may be blown. See §11.7 “Bypass Fuse Exchange”. | |
| ・ | must be pressed for at least 1 second. |
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| See §9.4 “UPS Shutdown (Daily)” for the correct shutdown procedure. |
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| However, bypass power supply continues if bypass operation was started |
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| by changing over with the forced bypass switch, overload, or failure. |
Output does not stop. | ・ Check the setting of item ⑪ “Inverter stop operation” in §10.1 “Setup | |
| Menu Item List”. It may be set to “Bypass”. The factory default setting is | |
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| “OFF”. |
| ・ Check the setting of item ⑨ “ | switch response time” in §10.1 | |
| “Setup Menu Item List” . It may be set to “3 seconds” or “Special | ||
| operation”. The factory default setting is “1 second”. | ||
| ・ Check whether the bypass fuse on the back panel is blown. It may have | ||
Output stops during | been blown by an overload or short circuit. | ||
Check the total load and the possibility of a short circuit. | |||
operation | When the total load is high, reduce the number of load devices connected | ||
| to the UPS. |
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| See §11.7 “Bypass Fuse Exchange”. |
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Output stops during a | ・ Check whether the batteries have reached their replacement interval. | ||
The battery service life will differ depending on the ambient | |||
power failure. | temperature. |
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| Replacing the batteries early is recommended. | ||
Alarm buzzer sounds. | ・ The alarm buzzer sounds when an error, abnormal state, or alarm | ||
condition is detected in the UPS. See §13 “Alarm Sounds”. | |||
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Alarm buzzer does not | ・ The alarm buzzer sound may be set to “OFF”. | ||
Check the setting of item ⑧ “Buzzer sound” in §10.1 “Setup Menu Item | |||
sound. | |||
List”. |
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Red ALARM LED is lit. | ・ A | ||
Contact your supplier. |
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