7
Tranquility
®
D i g i t a l ( D X M 2 ) — Tr o u b l e s h o o t i n g G u i d e
R e v. : 1 0 M a r c h , 2 0 1 5
w w w. c l i m a t e m a s t e r. c o m
Verify whether
the thermostat
is configured
for multi-stage
operation
No
Unit does
not seem to
be in second
stage. This is
indicated by the
performance
check being
about 30%
(low).
Verify that
you have
second
stage call
Does
DXM2
CCH have
24V?
Verify that
Dipswitch
1:4 is on
No
A-L
Yes
Yes
Yes
Does the rectifier
plug on the side
of the compressor
have 15-27 VDC?
Replace the
rectifier plug
No
With unit running in second
stage, check amp draw
of comp. Next, remove
rectifier plug. Amps should
be lower after removing
plug. Reattach plug and
verify that amps return to
previous higher reading.
Yes
A-S
Replace
compressor
No
Continued
The unit started
but runs and
loop temp
continue to drop
in the heating
mode
Yes
Verify the antifreeze
level where applicable.
Remember that EWT
below 45° needs 15° or
lower freeze protection.
Verify with appropriate
hydrometer.
A-R
Yes
Antifreeze has
been verified
as having 15°
or lower 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
Use Pressure Drop
Software to verify
If Dipswitch 1:4
is on, replace
board
Troubleshooting Flow Chart
No
No
