Warnings And Alarms; Alarms; Warnings; Warning And Alarm Messages - Trane TR150 Service Manual

Troubleshooting

4.6 Warnings and Alarms

When the frequency converter fault circuitry detects a fault
condition, or a pending fault, a warning, or alarm is issued.
A flashing display on the LCP indicates an alarm or
warning condition and the associated number code on line
2. Sometimes a warning precedes an alarm. Table 4.2
defines whether a warning precedes an alarm and whether
the frequency converter suspends operations (trips).
4 4

4.6.1 Alarms

An alarm causes the frequency converter to trip (suspend
operation). The frequency converter has 3 trip conditions
which are displayed on line 1:
TRIP (AUTO RESTART)
The frequency converter is programmed to restart
automatically after the fault is removed. The number of
automatic reset attempts can be continuous or limited to a
programmed number of attempts. If the selected number
of automatic reset attempts is exceeded, the trip condition
changes to TRIP (RESET).
TRIP (RESET)
Requires resetting of the frequency converter before
operation after a fault is cleared. The frequency converter
can be reset manually by pressing [Reset], a digital input,
or a serial bus command. For TR150 and TR170 frequency
converters, stop and reset are the same key. If [Off/Reset] is
used to reset the frequency converter, [Start] must be
pressed to initiate a run command in either local or
remote.
TRIPLOCK (DISC> MAINS)
Requires that the main AC input power to the frequency
converter must be disconnected long enough for the
display to go blank. The fault condition must be removed
and power reapplied. Following power up, the fault
indication changes to TRIP (RESET) and allow for manual,
digital, or serial bus reset.
Line 2 displays alarm and the associated number while line
3 identifies the alarm in plain language.
NOTICE
When exchanging the unit which requires fire mode
activation, carefully check that the Fire Mode parameters
•
Parameter 24-00 FM Function
•
Parameter 24-05 FM Preset Reference
•
Parameter 24-09 FM Alarm Handling
are correctly transferred into the exchange unit.
32

4.6.2 Warnings

During a warning, the frequency converter remains
operational, although the warning flashes for as long as
the condition exists. The frequency converter could,
however, reduce the warning condition. For example, if the
warning shown was warning 12, Torque Limit, the frequency
converter would reduce speed to compensate for the
overcurrent condition. Sometimes, if the condition is not
corrected or worsens, an alarm condition is activated and
the frequency converter stops output to the motor
terminals. Line 1 identifies the warning in plain language,
and line 2 identifies the warning number.

4.6.3 Warning And Alarm Messages

The LEDs on the front of the frequency converter and a
code in the display signal a warning or an alarm.
A warning indicates a condition that may require attention
or a trend that may eventually require attention. A warning
remains active until the cause is no longer present. Under
some circumstances, motor operation may continue.
A trip is the action when an alarm has appeared. The trip
removes power to the motor. It can be reset after the
condition has been cleared by pressing [Reset], or through
a digital input (parameter group 5-1* Digital Inputs). The
event that caused an alarm cannot damage the frequency
converter or cause a dangerous condition. Alarms must be
reset to restart operation once their cause has been
rectified.
The reset can be done in 3 ways:
•
•
•
NOTICE
After a manual reset pressing [Reset] on the LCP, press
[Auto On] to restart the motor.
An (X) marked in Table 4.2 means that action occurs. A
warning precedes an alarm.
If a situation occurs that can damage the frequency
converter or connected equipment, an alarm triggers a trip
lock. Power is removed from the motor. A trip lock can
only be reset after a cycling power has cleared the
condition. Once the problem has been rectified, only the
alarm continues flashing until the frequency converter is
reset.
02/2017 All rights reserved.
Press [Reset]
A digital reset input
Serial communication/optional fieldbus reset
signal
BAS-SVM04B-EN