Danfoss Turbocor TT Series Service Manual page 252

Table 5-2 Compressor Fault Types
Compressor Status Fault
Inverter Temperature
Discharge Temperature
Soft Start Temperature
Low Suction Pressure
Discharge Pressure
3-Phase Over-Current
Cavity Temperature
Leaving Fluid Temperature
Pressure Ratio
Bearing/Motor Fault Active
Sensor Fault
SCR Temperature
Lock Out Fault
Winding Temperature
High Suction Superheat
Page 252 of 294 - M-SV-001-EN Rev. H 1/23/2023
Description
The measured Inverter temperature has exceeded the fault limit.
The measured discharge temperature has exceeded the fault limit.
The measured Soft Start temperature has exceeded the fault limit.
The measured suction pressure has exceeded the fault limit.
The measured discharge pressure has exceeded the fault limit.
Instantaneous lock-out, pre-CC4.0.0.
The calculated 3 phase current has exceeded the fault limit.
Instantaneous lock-out , pre-CC4.0.0.
The measured cavity temperature has exceeded the fault limit.
The lowest acceptable measured leaving fluid temperature has been exceeded.
(Removed from CC 4.X.X software)
The calculated pressure ratio of discharge/suction has exceeded the fault limit.
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 type has occurred.
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 Fluid Temperature: >100 or < -20 °C
Suction Pressure: >1200 or < -30 kPa abs
Discharge Pressure: >3500 or < -30 kPa abs
The measured SCR temperature has exceeded the fault limit.
(Fault and Alarm removed from CC 4.2.X and later software)
Lock-Out faults require power cycle to reset.
Instantaneous lock outs:
Inverter Error - CC 4.X.X
Discharge Pressure - pre CC4.0.0
3 Phase Over Current - pre CC4.0.0
If any (or a combination of ) the faults listed below occurs more than 3 times within 30 minutes, a Lock-Out fault
occurs:
Discharge Pressure - CC 4.X.X
3-Phase Overcurrent - CC 4.X.X
Inverter Temperature
SCR Temperature
Motor Overcurrent
Inverter Error - pre CC4.0.0
Rotor Starting Torque
Low Motor Back EMF
The measured motor winding temperature has exceeded the fault limit.
The calculated Suction Superheat Temperature has exceeded the Fault limit.