ZIEHL MS 220 DA, Operating Instructions Manual

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7 Troubleshooting
7.1.1 Troubleshooting
• The resistance in the sensor circuit must have a value 50 Ω < R < 1500 Ω . The terminal voltage must be < 2.5 V with the resistors attached.
• If terminal T1-T2 is open, the relay must shut off. The terminal voltage must be about 9V.
7.1.2 Alarm/Warning Code List
The alarms and warnings directly related to the use of the Safe Stop functionality set-up in Par. 5-19 are listed in the following table.
No. Description Warning Alarm/ Trip Alarm/ Trip Lock Par. Ref.
68 Safe Stop Activated X
X
1) 5-19
71 PTC 1 Safe Stop X
X
1) 5-19
72 Dangerous Failure X 1) 5-19
1) Can not be auto reset via par. 14-20
Alarm 11, Motor Thermistor over temp., has to do with par. 1-93 and not MCB 112.
7.1.3 Description of Alarm Word, Warning Word and Extended Status Word
Bit Hex Dec AlarmWord AlarmWord2 WarningWord WarningWord2
30 40000000 1073741824 Safe Stop [A68]
PTC 1 Safe Stop
[A71]
Safe Stop
[W68]
PTC 1 Safe Stop
[W71]
31 80000000 2147483648
Dangerous Failure
[A72]
Alarm 68, Safe Stop
Safe Stop has been activated. To resume normal operation, apply 24 V DC to T-37, then send a reset signal (via Bus, Digital I/O, or by pressing [RESET]).
Warning 68, Safe Stop
Safe Stop has been activated. Normal operation is resumed when Safe Stop is disabled. Warning: Automatic Restart!
Alarm 71, PTC 1 Safe Stop
Safe Stop has been activated from the MCB 112 PTC Thermistor Card (motor too warm). Normal operation can be resumed when the MCB 112 applies
24 V DC to T-37 again (when the motor temperature reaches an acceptable level) and when the Digital Input from the MCB 112 is deactivated. When
that happens, a reset signal must be is be sent (via Bus, Digital I/O, or by pressing [RESET]).
Warning 71, PTC 1 Safe Stop
Safe Stop has been activated from the MCB 112 PTC Thermistor Card (motor too warm). Normal operation can be resumed when the MCB 112 applies
24 V DC to T-37 again (when the motor temperature reaches an acceptable level) and when the Digital Input from the MCB 112 is deactivated. Warning:
Automatic Restart.
Alarm 72, Dangerous Failure
Safe Stop with Trip Lock. The Dangerous Failure Alarm is issued if the combination of safe stop commands is unexpected. This is the case if the MCB 112
VLT PTC Thermistor Card enables X44/10 but safe stop is somehow not enabled. Furthermore, if the MCB 112 is the only device using safe stop (specified
through selection [4] or [5] in par. 5-19), an unexpected combination is activation of safe stop without the X44/10 being activated. The following table
summaizes the unexpected combinations that lead to Alarm 72. Note that if X44/10 is activated in selection 2 or 3, this signal is ignored! However, the
MCB 112 will still be able to activate Safe Stop.
MCB 112 VLT ® PTC Thermistor Option 7 Troubleshooting
MG.33.V2.02 - VLT ® is a registered Danfoss trademark
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