MTU 8V4000Lx4 Operating Instructions Manual page 110

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 – B - 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 demand is missing or
out of range
1.4550.139 – B - Demand Tracking Fault
Yellow alarm. Initiated by ProAct B-Bank.
Cause
ProAct setting is not correct.
1.4550.140 – B - Analog Position Demand Failed
Yellow alarm. Initiated by ProAct B-Bank.
Cause
ProAct setting is not correct.
1.4550.141 – B - PWM Position Demand Failed
Yellow alarm. Initiated by ProAct B-Bank.
Cause
ProAct setting is not correct.
1.4550.142 – B - CAN Position Demand Failed
Red alarm. Initiated by ProAct B-Bank.
Cause
Position demand not received or
received too late
110 | Troubleshooting | MS15026/00E 2015-05
Corrective action
1. Check room temperature. Restart ProAct.
2. Restart ProAct.
Corrective action
1. Check room temperature. 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.