Apc SILCON 60-80KW 208/480V UPS User Manual download pdf (Page 27)

Alarms and Events

990-4035

User Guide APC Silcon 60-80kW 208V/480V UPS 27

5.4 Rectifying Alarm Messages

Following actions may rectify alarm:

• Check local utility supply. Fuses may be blown or supply switched off

accidentally

• Check if UPS cooling air intake is blocked

• Check if load exceeds maximum output capacity

• If, with utility power switched on, there is no UPS output voltage - and an

attempt to restart the UPS is in vain - use the external service bypass

switch to bypass UPS

1. “Battery weak” message appears: Reset “battery weak” signal according to section 4.0

Parameter Settings and initiate battery capacity test according to Section 6.3. Battery

Capacity Test. Make a record of obtained back-up time and use battery monitor to reset

alarm. Leave the UPS to recharge battery for at least 16 hours. Start up second battery test

without changing the load. If the test result shows improved back-up time, continue the test

series until no or just insignificant improvements are obtainable. If battery is still weak -

call for assistance.

2. “Battery Defective” message appears: Call for assistance. See section 8.0 “How to contact

APC”.

40. RAM1 memory write error UPS fault Call for assistance

41. Memory write error UPS fault Call for assistance

42. Communication to VQ bypass

lost

UPS fault Call for assistance

43. Communication to VQ output

lost

UPS fault Call for assistance

44. Communication to DMU lost UPS fault Call for assistance

45. Communication to controller

lost

UPS fault.

Display will show invalid UPS

data

Call for assistance

46. Communication to parallel IF

lost

UPS fault Call for assistance

47. External shutdown accepted Remote signal for switching off

UPS accepted.

UPS switches off automatically

–

48. Communication to VQ mains

lost

UPS fault Call for assistance

49. Bypass syncronization error The UPS cannot synchronize with

bypass mains

Check if phase rotation of bypass

voltage is correct – if OK, call for

assistance

50. Battery charge error Transferred to battery operation

because of battery charge error

Check RFI input fuse and

feedback relay

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Apc SILCON 60-80KW 208/480V UPS User Manual Page 27

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