ClimateMaster Tranquility Digital DXM2 - Page 8

Tranquility
®
Digital (DXM2)—Troubleshooting Guide
Rev.: 10 March, 2015
8
Geothermal Heating and Cooling
Continued
Congure
No
See Lockout
Faults on page
51 under ‘Fault
Codes’
Is there more
than one unit
sharing a
common loop?
No
Properly congure
unit. See Section 3.3
and Section 3.4 on
page 57.
Does this unit
have a Variable
Speed Pump and
is it congured for
parallel pumping?
No
Yes Yes Yes
Is the thermostat
congured for the proper
model of the unit?
(Example: TZ036) This is
found on thermostat’s unit
conguration menu.
Yes Yes
Does the unit have the
correct ECM Motor? Check
the ECM table, which is in
the unit’s IOM.Compare to
the motor in the unit.
Verify pump is
supplying enough ow
using Pressure Drop
Software. Closed loop
2.25 - 3.0 gpm per ton.
Replace with
correct motor
No
The unit
periodically
locks out on LT1
in heating or
high pressure in
cooling
ATC Thermostat
says ‘ECM
Conguration
Error’
The unit does
run but ATC
Thermostat
says ‘Service
Needed’
Yes
Troubleshooting Flow Chart
This is the Unit
Performance Sentinel. In
cooling mode if LT2 is 40°
or lower or LT1 is 125° or
greater. In heating mode if
LT2 is 125° or greater.
Go to Faults
Code 8.
A-F
Next Page
No
No
No