Trane TR170 - Page 38

No. Text
1794 Power data not transferred correctly at power up
to DSP
1795 The DSP has received too many unknown SPI
telegrams
1796 RAM copy error
2561 Replace control card
2820 LCP stack overow
2821 Serial port overow
2822 USB port overow
3072-5122 Parameter value is outside its limits
5376-6231 Internal fault. Contact your Trane supplier or Trane
Service Department.
Table 4.4 Internal Fault Codes
ALARM 44, Earth fault II
There is a discharge from the output phases to earth,
either in the cable between the frequency converter and
the motor or in the motor itself.
Troubleshooting
Turn o the frequency converter and remove the
earth fault.
Measure the resistance to ground of the motor
leads and the motor with a megohmmeter to
check for earth fault in the motor.
WARNING 47, 24 V supply low
The 24 Vdc is measured on the control card.
WARNING 48, 1.8 V supply low
The 1.8Vdc supply used on the control card is outside of
the allowable limits. The supply is measured on the control
card.
Troubleshooting
•
Check for a defective control card.
•
If an option card is present, check for
overvoltage.
ALARM 51, AMA check U
nom
and I
nom
The settings for motor voltage, motor current, and motor
power are wrong.
Troubleshooting
•
Check the settings in parameters 1-20 to 1-25.
ALARM 52, AMA low I
nom
The motor current is too low.
Troubleshooting
•
Check the setting in parameter 1-24 Motor Current.
ALARM 53, AMA motor too big
The motor is too large for the AMA to operate.
ALARM 54, AMA motor too small
The motor is too small for the AMA to operate.
ALARM 55, AMA parameter out of range
The parameter values of the motor are outside of the
acceptable range. AMA does not run.
ALARM 56, AMA interrupted by user
The AMA is manually interrupted.
ALARM 57, AMA internal fault
Try to restart the AMA. Repeated restarts can overheat the
motor.
ALARM 58, AMA Internal fault
Contact a Trane supplier.
WARNING 59, Current limit
The current is higher than the value in
parameter 4-18 Current Limit. Ensure that motor data in
parameters 1-20 to 1-25 is set correctly. Increase the current
limit if necessary. Ensure that the system can operate safely
at a higher limit.
WARNING 60, External interlock
A digital input signal indicates a fault condition external to
the frequency converter. An external interlock has
commanded the frequency converter to trip.
Troubleshooting
•
Clear the external fault condition.
•
To resume normal operation, apply 24 Vdc to the
terminal programmed for external interlock.
•
Reset the frequency converter.
WARNING 66, Heatsink temperature low
This warning is based on the temperature sensor in the
IGBT module.
Troubleshooting
The heatsink temperature measured as 0 °C could indicate
that the temperature sensor is defective, thus causing the
fan speed to increase to the maximum. If the sensor wire
between the IGBT and the gate drive card is disconnected,
this warning is produced. Also, check the IGBT thermal
sensor.
ALARM 79, Illegal power section
conguration
The scaling card has an incorrect part number or is not
installed. The MK102 connector on the power card could
not be installed.
ALARM 80, Drive initialised to default value
Parameter settings are initialized to default settings after a
manual reset. To clear the alarm, reset the unit.
ALARM 84, LCP error
ALARM 84 is generated by the LCP and indicates an error
with the LCP.
ALARM 95, Broken belt
Torque is below the torque level set for no load, indicating
a broken belt. Parameter 22-60 Broken Belt Function is set
for alarm.
Troubleshooting
•
Troubleshoot the system and reset the frequency
converter after clearing the fault.
Troubleshooting TR150 and TR170 Service Manual
BAS-SVM04B-EN 02/2017 All rights reserved. 37
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