Danfoss Turbocor TTS Series, Service Manual

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242 of 282
M-SV-001-EN Rev. G
Compressor Description
Bearing/Motor Fault Active
If a motor fault type or a bearing fault type is present, then the bearing/
motor fault active is triggered.
This is not an actual fault, only an indication that a motor or bearing fault
has occurred.
Sensor Fault
If the following measured temperatures (in °C) or pressures in (kPa abs) are
surpassed, a sensor fault is triggered:
Inverter Temperature: >100 or < 0 °C
Cavity Temperature: >100 or < -20 °C
Suction Temperature: >100 or < -30 °C
Discharge Temperature: >110 or < -30 °C
Leaving Air/Water Temperature: >100 or < -20 °C
Suction Pressure: >1200 or < -30 kPa abs
Discharge Pressure: >3500 or < -30 kPa abs
SCR Temperature The measured SCR temperature has exceeded the fault limit.
Lock Out Fault
Lock-Out faults require power cycle to reset.
Instantaneous lock outs:
Discharge Pressure
3 Phase Over Current
If any (or a combination of) the faults listed below occurs more than 3
times within 30 minutes, a Lock-Out fault occurs:
Inverter Temperature
SCR Temperature
Motor High Current
Inverter Error
Rotor may be Locked
Back Electromotive Force (EMF) is low
Winding Temperature The measured motor winding temperature has exceeded the fault limit.
High Suction Superheat
The calculated Suction Superheat Temperature has exceeded the Fault
limit.
Table 5-3 Compressor Status 2 Faults
Compressor Description
Suction Pressure Sensor Fault only available in 4.X
Suction Temperature Sensor Fault only available in 4.X
Discharge Pressure Sensor Fault only available in 4.X
Discharge Temperature Sensor
Fault
only available in 4.X
Inverter Temperature Sensor Fault only available in 4.X
Cavity Temperature Sensor Fault only available in 4.X
Soft Start Temperature Sensor Fault only available in 4.X
Invalid Bearing Calibration Fault A valid bearing calibration is not stored in the EEPROM.
Inverter Cooling Control Fault If the temperature rises above the fault limit, the fault delay timer will
begin, the compressor will stop if the timer expires, if the temperature
falls below the fault limit, the timer will be reset.
Motor Cooling Control Fault If the temperature rises above the fault limit, the fault delay timer will
begin, the compressor will stop if the timer expires, if the temperature
falls below the fault limit, the timer will be reset.