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COMFORT ALERT DIAGNOSTIC MODULE
The Comfort Alert Diagnostic Module (CADM) monitors and
analyzes data from the Copeland Scroll
sor and the thermostat demand. The CADM also provides a
3-minute anti-recycle time delay to compressor cycling.
The CADM detects causes for electrical and system related
failures. Flashing LEDs communicate the Alert codes to guide
service technicians in accurately and quickly troubleshooting
the system and determining root cause for the failure.
Inputs to the CADM include 24-vac power, demand signal Y,
Y2, compressor contactor coil (common side) and compressor
power leads (from the compressor contactor).
INPUT
TERMINAL
Control Power
Control Common
Demand
Demand
a
Contactor Coil
Compressor T1
Compressor T2
Compressor T3
NOTE(S):
a.
Applies to 575J*07G/H and 575J*08M/N. Control of the compressor contactor
coil is through a contact between terminals P and C.
Communications of status and alert conditions is through
3 LEDs located on the top edge of the module housing (see
Fig. 31): POWER (green), ALERT (yellow), and TRIP (red).
The POWER LED indicates the presence of control power to
the CADM.
®
three-phase compres-
VOLTAGE
R
24-V
C
24-V
Y
24-V
Y2
24-V
P
24-V
T1
Line
T2
Line
T3
Line
Power
(GRN)
POWER
Alert
(YEL)
ALERT
TRIP
Trip
(RED)
Fig. 31 — CADM Housing/LED Locations
The ALERT LED indicates an abnormal condition exists in the
system through a flash code. The ALERT LED will blink a
number of times consecutively, pause and the repeat the pro-
cess. The number of blinks, defined in Table 16, correlates to a
particular abnormal condition; troubleshooting tips are provid-
ed for each Alert code. Reset of the ALERT may be automatic
or manual. If the fault condition causing the Alert is self-
corrected, the Alert code will be removed and the CADM will
automatically reset and allow the system to restart normally.
Manual reset for lockouts requires that main power to the 575J
unit be recycled after the cause for the Alert condition has been
detected and corrected.
The TRIP LED indicates either a time-delay period is currently
active (RED LED is blinking) or the module has locked out the
compressor (RED LED is on steady). A lockout condition will
occur for some faults as identified in Table 17. Reset of the
TRIP LED requires that unit main power be recycled after the
loss of power to the compressor condition has been detected
and corrected.
Simultaneous Blinking of YELLOW and RED LEDs indicates
control power input to the CADM is low. Check control circuit
transformer and wiring.
Troubleshooting the CADM Wiring – Flashing LEDs also indi-
cate wiring problems to the CADM. See Table 18 for discus-
sion of additional LED flash codes and troubleshooting
instructions.
31
Comfort Alert
™
Commercial Diagnostics
Green LED - 24VAC Power
Yellow LED - Flash Code
2
System Pressure Trip
3
Short Cycling
4
Locked Rotor
5
Open Circuit
T1
6
Missing Phase
7
Reverse Phase
8
Welded Contactor
9
Low Voltage
Red LED - Protector Open
or no compressor power
Active Protection
T2
PROT breaks 24VAC common
leg of compressor contactor coil
Reset codes and PROT lockout
by removing 24VAC to module
For Two-Stage Applications:
T3
DC SOL operating range: 4-18VAC
Compressor second stage is
energized when YA & Y2 are 24VAC
and Alert and Trip LEDs are off
EMERSON ™
Climate Technologies
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