Table 32: Overview of Errors 177–252
Error
num-
ber
Description LED indicators
LED1 LED2 LED4
Internal failure Reason Action Green constant
177 Ext Fail DI1: Reaction
SS1a
See 113 See 113 Red constant. Status depends on
safety function state
assigned to DI2.
Red flashing, cycle
(on 500 ms, off
500 ms)
178 Ext Fail DI2: Reaction
SS1a
See 114 See 114 Status depends on
Safety function state
assigned to DI1.
Red constant. Red flashing, cycle
(on 500 ms, off
500 ms)
179 Ext Fail Prec Thresh
Timer Elapsed: Reac-
tion SS1a
See 115 See 115 Status of LED 1 and LED2 depends on safety
function state assigned to DI1 and DI2.
Red flashing, cycle
(on 500 ms, off
500 ms)
180 Ext Fail SF activation
Speed Suspension: Re-
action SS1a
See 116 See 116 Red flashing, cycle
(on 500 ms, off
500 ms)
198 Int fail speed limit
SLSa: Reaction SS1b
See 70 See 70 Red constant
199 Int fail speed limit
SLSb: Reaction SS1b
See 70 See 70 Red constant
241 Ext Fail DI1: Reaction
SS1b
See 113 See 113 Red constant. Status depends on
safety function state
assigned to DI2.
Red flashing, cycle
(on 500 ms, off
500 ms)
242 Ext Fail DI2: Reaction
SS1b
See 114 See 114 Status depends on
Safety function state
assigned to DI1.
Red constant. Red flashing, cycle
(on 500 ms, off
500 ms)
243 Ext Fail Prec Thresh
Timer Elapsed: Reac-
tion SS1b
See 115 See 115 Red flashing, cycle
(on 500 ms, off
500 ms)
244 Ext Fail SF activation
Speed Suspension: Re-
action SS1b
See 116 See 116 Red flashing, cycle
(on 500 ms, off
500 ms)
252 Internal failure safety
option
Power cy-
cle the
drive. If
the prob-
lem per-
sists, con-
tact Dan-
foss.
8.2.1 Safety Option Warning
A warning message notifies that an issue exists on the safety option. It is not handled as an internal or external failure. These messages
are defined to indicate that a manual user action is required.
Warnings and Alarms
Installation Guide | VLT® Safety Option MCB 150/151
AQ279747441421en-000101 / 130R0292 | 89
Danfoss A/S © 2018.09
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