Eaton DS7 - Page 117

4 Operation
4.8 LED indicators
DS7 Soft starter 09/16 MN03901001Z-EN www.eaton.com 113
4.8.4.1 Error messages on start
Start (ramp) indicates the phase during which +A1 (and EN in sizes 3 and 4) is
activated and ramp time t-Start is active. This operating state is identical to
the phase in which, during continuous operation (TOR), control input +A1 is
switched o and delay ramp t-Stop (≧ 1) is active. The following error
messages may be issued in this operating state (start):
Table 21: Error messages on start
Message (PNU)
Errors Possible causes Remedy
Phase fault
(840.6310)
One phase missing on the
mains side
Fuse fault Change fuse
Wiring defective Control Wiring
Zero current detection
(860.0)
I
e
= 0 A
No power flow or current has
fallen below the thyristors’
holding current (∼ 0.5 A)
A motor is not connected or the
motor cable is broken
Check connection to T1, T2, T3
Heat sink overtemperature/
undertemperature
(860.16)
Heat sink temperature ≦ 0°C
or ≧ +80 °C
Device still overheated from last
start/stop
Wait for cool-down time to elapse; use fan
(DS7-FAN-032) if necessary
Excessively high control cabinet
temperature; fan filter soiled
Monitor the temperature in the control panel
Undertemperature; ambient air
temperature is too cold
Heat up the room or control panel and monitor
the temperature
Bypass contact not opening
(860.21)
• Bypass will not switch or
respond
• Bypass contact still
closed when a start
command is sent to +A1
• Bypass contact does not
open when +A1 is
switched off
Overload Replace device; check dimensioning
Short-circuit in soft starter
output
Check motor feeder
Bypass contact does not close at
TOR
(860.21)
The bypass contact is not
closed after ramp time t-Start
(= TOR) elapses
• Internal fault in soft starter
• Defective control section or
relay
Replace device
Thyristor is defective
(860.20)
• Fuse fault
• Unbalanced phase
currents (> 30 %)
• Different voltage
magnitude between
input (L1, L2, L3) and
output (T1, T2, T3) during
operation (TOR)
Soft starter was overloaded
during last stop
Thyristor destroyed
Replace device; check dimensioning
Lightning Exchange device; install lightning protection in
the installation
Supply voltage faulty
(860.19)
Excessively low voltage for
regulator supply
(U
s
<20VDC)
Overload of the external power
supply unit
Check dimensioning and overload of the power
supply unit
Supply voltage not available Check control signals for switching the supply
voltage; install interlocks for start command if
necessary
No release (EN)
(860.2) – only sizes 3 and 4
An enable signal is not sent
when EN is activated
Heat sink temperature ≦ 0°C Heat up the room or control panel and monitor
the temperature
Phase sequence error
(860.22)
Incorrect phase sequence The power supply phases are
connected in the wrong
sequence.
Swap the phases