Siemens SINAMICS PERFECT HARMONY GH180 - Page 477

Fault Display Type Enable Potential causes and corrective actions
xx Outlet Sensor Loss
xx = cell that is faulted
F Fixed Cause
Outlet Sensor Loss is a cell fault that indicates the water temperature
thermistor resistance is too high. This fault only applies to 600 AP AFE, 750
AP, and 750 AP 4Q cells.
Action
1. Fix any loose connections.
2. Replace outlet water thermistor.
3. Replace CCB.
xx Air Temp. Warning
xx = cell that has alarm
A Fixed Cause
This alarm occurs when the power cell detects an air temperature greater
than 60° C at the CCB. This alarm applies to 600 AP AFE, 750 AP, 750 AP 4Q,
and 1375 HV AP cells.
Action
1. Check for air restrictions to the cell and clear any obstructions.
2. Check for proper operation of heat exchanger blowers within the cell
cabinet and repair as necessary.
3. Fix any loose connections, replace outlet water thermistor, or replace
CCB.
xx Over Temp. Switch
xx = cell that has alarm
A Fixed Cause
The over-temperature switch alarm occurs if water 󹪞ow to the power cell is
insu󹪟cient to cool the cell. The overtemperature switch alarm is applica‐
ble to 600 AP AFE, 750 AP, and 750 AP 4Q cells.
Action
1. Check for restricted water 󹪞ow to the cell and correct as necessary.
2. Fix any loose connections.
3. Replace CCB or replace cell.
xx ADC Fail
xx = cell that is faulted
F Fixed Cause
This fault occurs if the analog to digital converter within the CCB ceases to
function. Applies to 600 AP AFE, 750 AP, 750 AP 4Q, and 1375 HV AP cells.
Action
Replace CCB or power cell.
xx IGBT OOS n
xx = cell that is faulted
n = 11, 12, 13,14,15,16
F Fixed Cause
Occurs when the IGBT doesn't switch properly when turned on, but has a
voltage higher than the forward dropping voltage on the device. Applies
to 600 AP AFE and 750 AP 4Q cells.
Action
1. Check cell connections between boards, including the 󹪝ber link.
2. Change gate driver boards.
3. Change cell CCB.
4. Change IGBT.
Troubleshooting Faults and Alarms
11.12 Cell Faults and Alarms
NXGPro+ Control Manual
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