MTU 20V4000L33F Operating Instructions Manual page 93

1.4550.136 – B - Temperature derating active
Yellow alarm. Initiated by ProAct B-Bank.
Cause
The internal temperature is
higher than the limit.
1.4550.137 – A - Temperature above 120 °C
Red alarm. Initiated by ProAct B-Bank.
Cause
The internal temperature is
higher than the limit.
1.4550.138 – B - Loss of Position Demand
Red alarm. Initiated by ProAct B-Bank.
Cause
Position specification missing or
is outside the range
1.4550.139 – B - Demand Tracking Fault
Yellow alarm. Initiated by ProAct B-Bank.
Cause
ProAct setting is incorrect.
1.4550.140 – B - Analog Position Demand Failed
Yellow alarm. Initiated by ProAct B-Bank.
Cause
ProAct setting is incorrect.
1.4550.141 – B - PWM Position Demand Failed
Yellow alarm. Initiated by ProAct B-Bank.
Cause
ProAct setting is incorrect.
1.4550.142 – B - CAN Position Demand Failed
Red alarm. Initiated by ProAct B-Bank.
Cause
Position specification not
received or received too late
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.
Corrective action
u Check setting.
Corrective action
u Check setting.
Corrective action
u Check cabling and setting.
MS150108/02E 2015-03 | Troubleshooting | 93