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T H E S M A R T S O L U T I O N F O R E N E R G Y E F F I C I E N C Y

C o n s o l e s

R e v. : 5 N o v. , 2 0 0 9 B

c l i m a t e m a s t e r. c o m

DXM Controls

DXM Control

For detailed control information, see CXM AOM (part
# 97B0003N12), DXM AOM (part #97B0003N13), Lon
controller AOM (part #97B0013N01) or MPC AOM (part #
97B0031N01).

-Slow Flash = 1 fl ash every 2 seconds
-Fast Flash = 2 fl ashes every 1 second
-Flash code 2 = 2 quick fl ashes, 10 second pause, 2 quick

fl ashes, 10 second pause, etc.

-On pulse 1/3 second; off pulse 1/3 second

Field Selectable Inputs

Test mode: Test mode allows the service technician to
check the operation of the control in a timely manner. By
momentarily shorting the test terminals, the DXM control
enters a 20 minute test mode period in which all time
delays are sped up 15 times. Upon entering test mode, the
status LED will fl ash a code representing the last fault. For
diagnostic ease at the thermostat, the alarm relay will also
cycle during test mode. The alarm relay will cycle on and
off similar to the status LED to indicate a code representing
the last fault, at the thermostat. Test mode can be exited by
shorting the test terminals for 3 seconds.
Retry mode: If the control is attempting a retry of a fault, the
status LED will slow fl ash (slow fl ash = one fl ash every 2
seconds) to indicate the control is in the process of retrying.

Field Confi guration Options

Note: In the following fi eld confi guration options, jumper
wires should be clipped ONLY when power is removed
from the DXM control.

Water coil low temperature limit setting: Jumper 3 (JW3-
FP1 Low Temp) provides fi eld selection of temperature

limit setting for FP1 of 30°F or 10°F [-1°F or -12°C]
(refrigerant temperature).
Not Clipped = 30°F [-1°C]. Clipped = 10°F [-12°C].
Air coil low temperature limit setting: Jumper 2 (JW2-FP2
Low Temp) provides fi eld selection of temperature limit
setting for FP2 of 30°F or 10°F [-1°F or -12°C] (refrigerant

temperature). Note: This jumper should only
be clipped under extenuating circumstances,
as recommended by ClimateMaster technical
services.
Not Clipped = 30°F [-1°C]. Clipped = 10°F
[-12°C].
Alarm relay setting: Jumper 4 (JW4-AL2 Dry)
provides fi eld selection of the alarm relay
terminal AL2 to be jumpered to 24VAC or to be
a dry contact (no connection).
Not Clipped = AL2 connected to R.
Clipped = AL2 dry contact
(no connection).
Low pressure normally open: Jumper 1 (JW1-
LP norm open) provides fi eld selection for
low pressure input to be normally closed or
normally open.

Not Clipped = LP normally closed. Clipped = LP
normally open.

DIP Switches

Note: In the following fi eld confi guration options, DIP
switches should only be changed when power is removed
from the DXM control.

DIP Package #1 (S1)

DIP Package #1 has 8 switches and provides the
following setup selections:
1.1 - Unit Performance Sentinel (UPS) disable: DIP Switch
1.1 provides fi eld selection to disable the UPS feature.
On = Enabled. Off = Disabled.
1.2 - Compressor relay staging operation: DIP 1.2
provides selection of compressor relay staging operation.
The compressor relay can be selected to turn on with
a stage 1 or stage 2 call from the thermostat. This is
used with dual stage units (2 compressors where 2 DXM
controls are being used) or with master/slave applications.
In master/slave applications, each compressor and fan will
stage according to its appropriate DIP 1.2 setting. If set
to stage 2, the compressor will have a 3 second on-delay
before energizing during a Stage 2 demand. Also, if set for
stage 2, the alarm relay will NOT cycle during test mode.
On = Stage 1. Off = Stage 2.
1.3 - Thermostat type (heat pump or heat/cool): DIP 1.3
provides selection of thermostat type. Heat pump or
heat/cool thermostats can be selected. When in heat/