Diagnostics - Trane UCM-CLD Owner's Manual

If there are no diagnostic messages,
the selected menu item will be
displayed continuously. If the
diagnostics key is pressed and there
are no active diagnostics, the
readout on the display will be:
NO ACTIVE DIAGNOSTICS
PRESENT
When a system malfunction occurs,
one of the following appropriate
diagnostic messages will be
displayed:
*** A machine shutdown has
occurred ! ***
A machine shutdown occurred
but has cleared "press (Next)"
*** A circuit shutdown has
occurred ! ***
A circuit shutdown occurred
but has cleared "press (Next)"
*** Informational warning ***
An informational warning occurred
but has cleared "press (Next)"
16

Diagnostics

When a circuit shutdown - manual
reset (CMR) or a machine shutdown
- manual reset (MMR) occurs, the
red LED to the right of the display
will flash. Otherwise this alarm LED
is de-energized.
If more than one diagnostic is
present, only the highest priority
active diagnostic will be explained
in detail. For example, if the
diagnostics occur in the following
order before the operator returns -
IFW, MMR, CMR - the display will
read:
*** A machine shutdown has
occurred ! ***
because the MMR has the highest
priority. However, as the operator
moves through the diagnostic menu
to the "Last diagnostic, " the
[Diagnostic description] will show
the CMR diagnostic as well as the
IFW. If the "Next" key is pressed,
the display will show all the other
active and historic diagnostics.
The active diagnostic priorities,
listed from highest to lowest are:
Machine shutdown - manual reset
(MMR)
Machine shutdown - automatic reset
(MAR)
Circuit shutdown - manual reset
(CMR)
Circuit shutdown - automatic reset
(CAR)
Informational warning (IFW)
RLC-SVU02F-E4