APC SILCON 60-80KW 208/480V UPS - Manual (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