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Error
No.
Description
Led Indications
LED1
LED 2
LED4
Internal failure Reason
Action
Status of LED 1 and LED2 depends on
safety function state assigned to DI1
and DI2
Green
constant
70
Int fail speed
limit SLSa :
Reaction STO
Happens during ramping to
SLS limit, see 68.
Happens during speed below
SLS limit:
•
If speed is above cut-off
speed at activation point
and
42-53 Start Ramp
is set
to “No”, this error occurs.
•
Noise on the feedback
signal (incl. quantisation
noise) is larger than
expected.
•
Load change takes place,
do as in above point)
•
Change
42-53 Start
Ramp
to “Yes” and
set
42-54 Ramp Down
Time
accordingly.
•
Increase
42-50 Cut Off
Speed
or decrease
42-51 Speed Limit
to
get a larger tolerance
Red constant
71
Int fail speed
limit SLSb :
Reaction STO
See 70
See 70
Red constant
72
Internal failure
MCB 150/151
•
First, power cycle the
frequency converter
or restart the safety
option by
42-90 Restart Safe
Option
. Secondly, try
to make a general
reset of the safety
option with the
“Administration”
button (safety option
goes back to blank
initial state)
•
If the problem
persists, contact
Danfoss
Red constant
73
Internal failure
MCB 150/151
•
First, power cycle the
frequency converter
or restart the safety
option by
42-90 Restart Safe
Option
.
•
If the problem
persists, contact
Danfoss
Red constant
Warnings and Alarms
Operating Instructions
62
Danfoss A/S © Rev. 2014-02-11 All rights reserved.
MG34W302
8
8
Summary of Contents for VLT Safety Option MCB 150
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