Trane ComfortLink II 4TWL9024A1000B Installer's Manual page 26

C C o o m m m m u u n n i i c c a a t t i i n n g g D D i i s s p p l l a a y y A A s s s s e e m m b b l l y y ( ( C C D D A A ) )
1. System must be running with demand from the
thermostat.
2. FRC DFT TEST can be initiated in heat mode only.
3. Press ENTER to begin forced defrost.
4. Execute Forced Defrost following Forced Defrost
(Defrost terminates on Coil Temperature or
maximum time override of 15 minutes).
5. When test begins, TEST IN PROGRESS displays on
line 1 and Coil Temperature value on line 2.
N N o o t t e e : : Home Screen, under System Status will display
DEFROST.
6. When test is complete, TEST COMPLETE displays
for 10 seconds.
7. If there is a defrost fault condition, test terminates
and sends alert to the alert menu.
8. For more information, refer to the Alert Code Tables
in Service Facts and Technical Service Manual (Pub.
No. 34–4103–04) documents.
N N o o t t e e : : Screens will update as the test proceeds.
N N o o t t e e : : For Variable Speed Side Discharge models,
Forced Defrost is selected either in the CDA or
from the FRC DFT button on the VSPD Side
Discharge AOC.
26
Figure 2. Force Defrost Button
18-BC100D1-1D-EN