Epcom Power Line
18 | RT Series True Online UPS RT Series True Online UPS | 19
Operation Mode and LCD Display Description
CUCF Mode
Frequency conversion mode is mainly to provide a
stable voltage and frequency (mainly in terms of
frequency). After starting this mode, its output will not
be affected by utility to meet input needs of some
precision equipment and make users’ load more stable
and secure. After opening CUCF mode setup, LCD
displays ‘CUCF’. Under the CUCF mode, when the
output frequency is set to 50HZ, the load capacity
decreased to 80% of the original volume; when the
output frequency is set to 60HZ, the load capacity
decreased to 70% of the original capacity. The output
frequency is xed with the setting values, it doesn’t
vary with utility change. And the UPS can not be set to
going bypass under this mode.
Fault Mode
When UPS has a failure, the buzzer beeps and the
UPS turns to fault mode. UPS cuts off the output and
LCD displays fault codes. At the moment, users can
press the mute key to make the buzzer stop beeping
temporarily to wait for maintenance. Users can also
press the OFF key to shut down the UPS when conrm
that there is no serious fault.
6. Fault Messages
Table 1: Fault Code Messages
Fault Code Fault Type Bypass Output Note
0, 1, 2, 3, 4 Bus high yes
5, 6, 7, 8, 9, Bus low yes
10, 11, 12, 13, 14 Bus unbalance yes
15, 16, 17, 18, 19 Bus soft start fail yes
20, 21, 22, 23, 24 Inverter soft start fail yes
25, 26, 27, 28, 29 Inverter high yes
30, 31, 32, 33, 34 Inverter low yes
35, 36, 37, 38, 39 Bus discharge fail yes
40, 41, 42, 43, 44 Over heat yes
45, 46, 47, 48, 49 OP(inverter) short yes
50, 51, 52, 53, 54 Overload yes
55, 56, 57, 58, 59 Line NTC break yes
60, 61, 62, 63, 64 Shutdown fault yes
65, 66, 67, 68, 69 AC input fuse open yes unused
70, 71, 72, 73, 74 Communication fault yes unused
75, 76, 77, 78, 79 Communication fault yes
80, 81, 82, 83, 84 Relay fault yes
85, 86, 87, 88, 89 AC input SCR fault yes unused
90, 91, 92, 93, 94 CAN fault yes
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