Trane UHMB060ACV3VA Series Service Facts page 50

Service Facts
DEFINITION:
This error is normally caused by
improper installation or application of
the venting system.
Replace limit switch
Check operation
50
9 Flash Fault LED
Refer to 4 Flash
YES
Fault section
NO
Verify venting and vent terminations
are within allowable limits and clear
Scroll through
User Interface to
View number 1 of
Last 4 Faults
User Interface
shows IND
LIMIT?
Does User
Interface show High
Limit Trip in the
Last 4 Faults?
NO
Disconnect
electrical power
from unit & remove
wiring from the limit
Does "COLD" switch
ohm out "closed"?
Zero Ohms
YES
any obstructions.
UHM-DHM-SF-1H