ClimateMaster Tranquility Digital - Page 7

7
Troubleshooting Guide - Tranquility
®
Digital (DXM2) Packaged Units
Rev.: 01/15/14
Verify whether
the thermostat
is confi gured
for multi-stage
operation
No
Unit does not
seem to be
in the second
stage. This is
indicated by the
performance
check being
about 30% off
(low).
Verify that
you have
second
stage call
Does
DXM2
CCH have
24V?
Verify that
Dipswitch
1:4 is on
No
A-L
A-L
Yes
Yes
Yes
Does the rectifi er
plug on the side
of the compressor
(15-27 VDC) have
24 volts?
Replace the
rectifi er plug
No
For amp draw, check
with unit running and
then check amp draw
of comp. Next, remove
rectifi er plug. Amps
should be lower after
you remove plug. After
you reattach plug, amps
should go back up.
Yes
A-S
A-S
Replace
compressor
No
Continued
The unit started
but runs and
loop temp keep
dropping in the
heating mode
Yes
Verify the antifreeze
level where applicable.
Remember that EWT
below 45° needs 15°
freeze protection.
Verify with appropriate
hydrometer.
A-R
A-R
Yes
Antifreeze has
been verifi ed
as having
15° freeze
protection.
Then cut the
JW3 jumper
Yes
Is there enough loop in
the ground? Is the loop
making good contact?
(Example: Is your
vertical loop grouted
from top to bottom?)
Is the loop turbulent?
Min 2500 Reynolds
Number.
Yes
Next Page
Replace
board
Use Pressure Drop
Software to verify
Troubleshooting Flow Chart
No
No