33
c l i m a t e m a s t e r. c o m
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
Tranquility
®
Compact (TC) Series
R e v. : 0 2 / 0 4 / 1 3
Safety Features - CXM and DXM Controls
If a UPS condition occurs, the control will immediately
go to UPS warning. The status LED will remain on as if
the control is in normal mode. Outputs of the control,
excluding LED and alarm relay, will NOT be affected
by UPS. The UPS condition cannot occur during a
compressor off cycle. During UPS warning, the alarm
relay will cycle on and off. The cycle rate will be “on” for
5 seconds, “off” for 25 seconds, “on” for 5 seconds, “off”
for 25 seconds, etc.
UPS warning code = 8
Swapped LT1/LT2 thermistors: During test mode, the
control monitors to see if the FP1 and FP2 thermistors are
in the appropriate places. If the control is in test mode,
the control will lockout with code 9 after 30 seconds if:
a. The compressor is on in the cooling mode and the LT1
sensor is colder than the LT2 sensor, or:
b. The compressor is on in the heating mode and the LT2
sensor is colder than the LT1 sensor.
Swapped LT1/LT2 thermistor code = 9.
ESD (DXM only): The ESD (Emergency Shut Down)
mode can be enabled from an external common signal
to terminal ESD to shut down the unit. The green status
light will fl ash code 3 when the unit is in ESD mode.
ESD mode = code 3 (green “status” LED)
Diagnostic Features
The LED on the CXM board advises the technician of the
current status of the CXM control. The LED can display
either the current CXM mode or the last fault in memory
if in test mode. If there is no fault in memory, the LED will
fl ash Code 1 (when in test mode).
The green status LED and red fault LED on the DXM
board advise the technician of the current status of the
DXM control. The status LED will indicate the current
mode that the DXM control is in. The fault LED will
ALWAYS fl ash a code representing the LAST fault in
memory. If there is no fault in memory, the fault LED will
fl ash Code 1. The yellow test LED will turn on when in
test mode.
CAUTION: Do not restart units without
inspection and remedy of faulting condition. Damage
may occur.
CXM/DXM Control Start-up Operation
The control will not operate until all inputs and safety
controls are checked for normal conditions. The com-
pressor will have a 5 minute anti-short cycle delay at
power-up. The fi rst time after power-up that there is a
call for compressor, the compressor will follow a 5 to 80
second random start delay. After the random start delay
and anti-short cycle delay, the compressor relay will be
energized. On all subsequent compressor calls, the ran-
dom start delay is omitted.
