Troubleshooting - Trane RTHD Installation Instructions Manual

Troubleshooting

The drive displays three types of faults:
• Warning
A warning or alarm is signaled by the LEDs on the front of
the AFD by a code on the LCP.
A warning indicates a condition that may require attention
or a trend that may eventually require attention, and will
remain active until the cause is no longer present. Under
some circumstances, motor operation may continue.
• Trip
A trip is the action when an alarm has appeared. The trip
removes power to the motor and, after the condition has
been cleared, can be reset by pressing the Reset button.
The event that caused an alarm cannot damage the AFD
or cause a dangerous condition.
After its cause has been rectified, an alarm must be reset
to restart operation.
• Trip Lock
A trip lock is an action when an alarm occurs that may
cause damage to the AFD or equipment. Power is
removed from the motor, and a trip lock can only be reset
after the condition is cleared by cycling power.
Once the problem has been rectified, only the alarm
continues flashing until the AFD is reset.
WARNING
Hazardous Voltage w/Capacitors!
Failure to disconnect power and discharge capacitors
before servicing could result in death or serious injury.
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives
or other energy storing components provided by Trane
or others, refer to the appropriate manufacturer's
literature for allowable waiting periods for discharge of
capacitors. Verify with a CAT III or IV voltmeter rated per
NFPA 70E that all capacitors have discharged.
®
1. CH531/Tracer AdaptiView™ only: Collect alarm and
parameter information.
a. DO NOT cycle unit power or reset the controls. Leave
the AFD and the UC800 in their present states.
b. Record all UC800 active and historic alarms. Make a
full chiller service report.
c. Document and check all applicable parameter settings.
This information can be verified off of the chiller
nameplate, and by referring to this manual.
d. In the Binding view of the Tracer TU service tool, verify
there is a green face indicating that the Starter LLID is
bound.
e. Record any drive diagnostics found.
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2. Collect Chiller Information.
a. Note the following chiller information:
• Operating mode and any sub-mode (i.e., 100% or
75% load etc.)
• Number of chiller starts, and hours of operation.
• Time since last diagnostic shutdown (<1 minute, <1
hour, >1 hour, etc.)
b. What was the chiller state at the time of the failure?
(Chiller starting? Running low load? Running full load?
etc.)
c. Record the chiller's sales order and serial numbers,
and the drive's serial and model numbers.
3. Troubleshooting
a. Measure and record the DC bus (via the Local Control
Panel [LCP]).
b. Check ALL wiring (tightness, ribbon cables fully seated,
proper phasing, etc.)
c. Refer to the Danfoss manuals for further
troubleshooting information.
SO-SVN048A-EN