Danfoss Turbocor TT Series Service Manual page 253

Table 5-3 Compressor Status 2 Faults
Compressor Status 2 Fault
Suction Pressure Sensor Fault
Suction Temperature Sensor
Fault
Discharge Pressure Sensor Fault
Discharge Temperature Sensor
Fault
Inverter Temperature Sensor
Fault
Cavity Temperature Sensor Fault
Soft Start Temperature Sensor
Fault
Invalid Bearing Calibration Fault
Inverter Cooling Control Fault
Motor Cooling Control Fault
Table 5-4 Motor Fault Types
Motor/System Status
Motor Single Phase Overcurrent
Fault
DC Bus Overvoltage Fault
Motor High Current Fault
Inverter Error
Bearing Fault Active
Rotor Starting Torque Fault
Low Inverter Current Fault
DC Bus Under/Over Voltage
Fault
24VDC Under/Over Voltage
Fault
Low Motor Back EMF Fault
EEPROM Checksum Fault
Generator Mode Active
SCR Ripple Voltage Fault
System in Startup mode
Description
Sensor errors occur when the sensor is providing a reading that is outside the normal readable range
and indicates an error in the reading, or a functional problem with the sensor. - only available in 4.X
A valid bearing calibration is not stored in the EEPROM.
The measured Inverter Temperature has exceeded the Cooling Control Fault limit after the Fault Delay timer has
expired. I f the temperature rises above the fault limit, the fault delay timer will begin, if the temperature falls
below the fault limit, the timer will be reset, the compressor will stop if the timer expires.
The measured Cavity Temperature has exceeded the Cooling Control Fault limit after the Fault Delay timer has
expired. I f the temperature rises above the fault limit, the fault delay timer will begin, if the temperature falls
below the fault limit, the timer will be reset, the compressor will stop if the timer expires.
Description
Measured peak current value of any single phase to motor (from Inverter) exceeds the fault limit.
The measured DC bus voltage has exceeded the Maximum DC Bus Voltage limit, while RPM is >0
The motor current has exceeded Maximum Motor Current limit.
Inverter reports a generic error, or communication to BMCC is lost.
If a Bearing Status Fault type is present, then the Bearing Fault Active is triggered. This is not an actual fault, only
an indication that a fault has occurred in the Bearing Status section.
Motor Current maximum has been exceeded during compressor start-up.
Measured current to motor (from Inverter) has not reached the Minimum Power limit.
At 0 RPM: The measured DC Bus voltage is measured lower or higher than the DC Bus Under or Over V oltage Fault
limits.
The measured 24VDC supply is outside the range of the low or high limit.
The calculated motor back EMF has fallen below the minimum Back EMF limit.
An error (checksum error) occurs reading the data table from the EEPROM.
At greater than 0 RPM and DC bus voltage low, Generator mode is enabled, switching the Inverter to rectifier
function to maintain the DC bus voltage until the shaft comes to a stop and delevitates.
The DC bus voltage ripple exceeds the SCR Voltage Ripple Fault limit.
The compressor initialization has not finished. Please wait. Compressor is resetting after a power cycle. This is a
status message.
M-SV-001-EN Rev. H-1/23/2023 Page 253 of 294