26 User Guide APC Silcon 10-40kW 208V/480V UPS
990-4034
Alarms and Events
34. Output outside tolerance Output voltage outside tolerance Call for assistance
35. Output frequency outside
tolerance
Output frequency outside
tolerance
Call for assistance
36. High battery temperature Battery ambient temperature too
high
Check system ambient
temperature, check fan, check for
airflow obstructions
37. Battery weak Battery capacity below 75% or
battery MCCB/fuse switched off
Test battery capacity
38. Battery defective Insufficient battery capacity or
battery MCCB/fuse switched off
Call for assistance
39. System locked in operation
mode
UPS has made 10 attempts within
1 minute to switch from bypass to
battery operation, or “High DC
warning” has appeared 10-20
times within 1 minute
Unlock.
If message reappears -
call for assistance
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