Trane TR170 - Page 35

frequency converter or connected parts. A trip lock
situation can only be reset by a power cycling.
Warning Yellow
Alarm Flashing red
Table 4.3 LED Indication
The alarm words, warning words and extended status
words can be read out via serial bus or optional
eldbus
for diagnosis.
WARNING/ALARM 2, Live zero error
This warning or alarm only appears if programmed in
parameter 6-01 Live Zero Timeout Function. The signal on 1
of the analog inputs is less than 50% of the minimum
value programmed for that input. Broken wiring or a faulty
device sending the signal can cause this condition.
Troubleshooting
•
Check connections on all analog mains terminals.
- Control card terminals 53 and 54 for
signals, terminal 55 common.
- General Purpose I/O terminals 11 and 12
for signals, terminal 10 common.
- Analog I/O Option terminals 1, 3, and 5
for signals, terminals 2, 4, and 6
common.
•
Check that the frequency converter programming
and switch settings match the analog signal type.
•
Perform an input terminal signal test.
WARNING/ALARM 4, Mains phase loss
A phase is missing on the supply side, or the mains
voltage imbalance is too high. This message also appears
for a fault in the input rectier. Options are programmed in
parameter 14-12 Function at Mains Imbalance.
Troubleshooting
•
Check the supply voltage and supply currents to
the frequency converter.
WARNING/ALARM 7, DC overvoltage
If the intermediate circuit voltage exceeds the limit, the
frequency converter trips after a time.
Troubleshooting
Extend the ramp time
Change the ramp type
Increase parameter 14-26 Trip Delay at Inverter
Fault
WARNING/ALARM 8, DC under voltage
If the DC-link voltage drops below the undervoltage limit,
the frequency converter checks for 24 V DC back-up
supply. If no 24 V DC back-up supply is connected, the
frequency converter trips after a xed time delay. The time
delay varies with unit size.
Troubleshooting
•
Check that the supply voltage matches the
frequency converter voltage.
•
Perform an input voltage test.
•
Perform a soft-charge circuit test.
WARNING/ALARM 9, Inverter overload
The frequency converter has run with more than 100%
overload for too long and is about to cut out. The counter
for electronic thermal inverter protection issues a warning
at 98% and trips at 100% with an alarm. The frequency
converter cannot be reset until the counter is below 90%.
Troubleshooting
•
Compare the output current shown on the
keypad with the frequency converter rated
current.
•
Compare the output current shown on the
keypad with the measured motor current.
•
Show the thermal frequency converter load on
the keypad and monitor the value. When running
above the frequency converter continuous
current rating, the counter increases. When
running below the frequency converter
continuous current rating, the counter decreases.
WARNING/ALARM 10, Motor overload temperature
According to the electronic thermal protection (ETR), the
motor is too hot.
Select 1 of these options:
•
The frequency converter issues a warning or an
alarm when the counter is >90% if
parameter 1-90 Motor Thermal Protection is set to
warning options.
•
The frequency converter trips when the counter
reaches 100% if parameter 1-90 Motor Thermal
Protection is set to trip options.
The fault occurs when the motor runs with more than
100% overload for too long.
Troubleshooting
•
Check for motor overheating.
•
Check if the motor is mechanically overloaded.
•
Check that the motor current set in
parameter 1-24 Motor Current is correct.
•
Ensure that the motor data in parameters 1-20 to
1-25 is set correctly.
•
If an external fan is in use, check that it is
selected in parameter 1-91 Motor External Fan.
•
Running AMA in parameter 1-29 Automatic Motor
Adaptation (AMA) tunes the frequency converter
to the motor more accurately and reduces
thermal loading.
Troubleshooting
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