WEG UR11 Series, User Manual

Page: 47 / 57

Troubleshooting and Maintenance
5
5-2 | UR11
Table 5.1 - Operation of faults and alarms
Name Description
Inputs. +24 Vdc. +24 Vdc power supply of the CIR11 board.
R, S, T. R1, S1, T1, R2, S2 and T2 input power connections.
Pre-charge. Pre-charge status: "Not-performed", "In progress" or "Completed".
Temperature. UR11 heatsink temperature measured through the NTCs.
RL outputs. RL1. Relay output with the pre-charge status indication function (UDC1_OK & UDC2_OK). It closes when the two
UR11 rectifier diode bridges completed the pre-charge.
RL2. Output relay with "No Temperature Alarm" function. It opens under alarm condition.
RL3. Output relay with "No Temperature Fault" function. It opens under fault condition.
LEDs. 12 V ON. Green LED with +12 V ON power supply indication, generated at CIR11 from the + 24 Vdc.
UDC_1 OK. Green LED with status function indication of one UR11 input rectifier bridge - it lights when its pre-charge is
completed.
UDC_2 OK. Green LED with status function indication of the other UR11 input rectifier bridge - it lights when its pre-charge
is completed.
TEMP_ALARM. Yellow LED that lights when the UR11 temperature is too high (alarm).
TEMP_FAULT. Red LED that lights under overtemperature or undertemperature fault condition
Table 5.2 - Faults, alarms and possible causes
Inputs Outputs LEDs
Possible Causes
+24 Vdc R, S, T Pre-charge Temperature RL1 RL2 RL3
+12 V
ON
UDC_1
OK
UDC_2
OK
Temp
Alarm
Temp
Fault
OK OFF OFF T
MIN
≤ T ≤ T
AL
OFF ON ON ON OFF OFF OFF OFF + 24 Vdc applied to the control
circuit (CIR11) and the main power
supply (R, S and T) is missing. Ready
for power energization.
OK OK In progress
(1)
T
MIN
≤ T ≤ T
AL
OFF ON ON ON OFF OFF OFF OFF Power supply connected, pre-charge
in progress.
OK OK Completed T
MIN
≤ T ≤ T
AL
ON ON ON ON ON ON OFF OFF REGULAR OPERATION.
OK Phase fault
undervoltage.
OFF T
MIN
≤ T ≤ T
AL
OFF ON ON ON OFF
(2)
OFF
(3)
OFF OFF Phase fault or undervoltage at the
input power (2) (3) .
Open fuse.
Open circuit breaker.
OK OK OFF T
MIN
≤ T ≤ T
AL
OFF ON ON ON OFF
(2)
OFF
(3)
OFF OFF Defective UR11.
OK OK Completed T
AL
(4)
< T ON OFF ON ON ON ON ON OFF Heatsink temperature higher
than 80 °C (176 °F) (alarm
temperature).
OK OK OFF T
FAULT
(4)
< T OFF OFF OFF ON OFF OFF ON ON Heatsink overtemperature,
higher than 90 °C (194 °F) (fault
temperature).
OFF
(5) (5) (5)
OFF OFF OFF OFF OFF OFF OFF OFF Control (CIR11) w24 Vdc
power supply.
OK OK OFF T < T
MIN
OFF ON OFF ON OFF OFF OFF ON Heatsink undertemperature, smaller
than -9 °C (16 °F).
Defective or opened NTC.
Note:
(1)
Temporary operation condition.
(2) Phase fault / undervoltage / defective rectifier bridge 1 - refer to Figure 2.5 on page 2-7 .
(3) Phase fault / undervoltage / defective rectifier bridge 2 - refer to Figure 2.5 on page 2-7 .
(4) The monitoring temperatures are:
- High temperature alarm: active with T
AL
≅
80 ºC (TEMP_ALARM).
- Overtemperature fault: active with T
FAULT
≅ 90 ºC (TEMP_FAULT).
- Undertemperature fault: active with T
MIN
≅
-9 ºC (TEMP_FAULT).
(5) The input state is not decisive for the outputs state.