MTU 12 V 4000 L62FB Operating Instructions Manual page 90

1.4550.133 – B - Input (Supply) Voltage Fault
Yellow alarm. Initiated by ProAct A-Bank.
Cause
Supply voltage has reached
maximum or minimum limit value.
1.4550.134 – B - Position Error
Red alarm. Initiated by ProAct A-Bank.
Cause
Position specification and
feedback signal do not match
1.4550.135 – B - Temperature Sensor Fault
Red alarm. Initiated by ProAct A-Bank.
Cause
Hardware not ready for operation.
1.4550.136 – B - Temperature derating active
Yellow alarm. Initiated by ProAct A-Bank.
Cause
The internal temperature is higher
than the limit.
1.4550.137 – A - Temperature above 120 °C
Red alarm. Initiated by ProAct A-Bank.
Cause
The internal temperature is higher
than the limit.
1.4550.138 – B - Loss of Position Demand
Red alarm. Initiated by ProAct A-Bank.
Cause
Position specification missing or
is outside the range
1.4550.139 – B - Demand Tracking Fault
Yellow alarm. Initiated by ProAct A-Bank.
Cause
ProAct setting is incorrect.
90 | Troubleshooting | MS150098/02E 2016-11
Corrective action
1. Check supply voltage.
2. Check cabling.
Corrective action
1. Check mechanical system.
2. Restart ProAct.
Corrective action
u Restart ProAct.
Corrective action
1. Check temperature in room. Restart ProAct.
2. Restart ProAct.
Corrective action
1. Check temperature in room. Restart ProAct.
2. Restart ProAct.
Corrective action
1. Check setting.
2. Check cabling.
Corrective action
u Check setting.