ClimateMaster Tranquility Digital - Component Electrical Diagnostics; Contactor Troubleshooting Chart; Verifying Pump Feedback Signal

11
Troubleshooting Guide - Tranquility
®
Digital (DXM2) Packaged Units
Rev.: 01/15/14
Verifying Pump Feedback Signal
Contactor Chart
A-A
A-A
Contactor
closed
Motor does
not hum
Burned
contacts
Open in low
voltage circuit
Incorrect
wiring
Open motor
wiring
Open overload
switch
Motor hums, cuts off
on overload circuit
breaker or blows
fuses
Compressor tight or
stuck
High discharge
pressure not
equalized
Low line
voltage
Burnt out or
open winding
Non-condensibles in
refrigerant circuit
Compressor open
Buzzing
Check
contactor
Normal voltage
to coil
Contactor defective,
jammed or hung up
Low voltage
to coil
Wrong gauge of
thermostat wire
Low voltage from
transformer
Not buzzing
Loose
wire
No voltage
to coil
No power
to control circuit
Voltage
to coil
Coil open
circuited
A-B
A-B
Alarm
Relay
Off On
A
OVR
ESD
C
Acc1
Relay
Acc2
Relay
H
COM
NC1
NO1
COM
NC2
NO2
P3
Status
Fault
R R
S1
S2
Factory Use
U1
Off
COH
COM
AO2
P11
Gnd
T1 T2 T2 T3
A0-1 A0-
Off On
S3
1 2 3 4
1 2 3 4 5 6 7 8
0-2 VDC with pump on
3-4 VDC with pump off
Ensure that correct wiring has landed on T1
Yellow, A02 White. If not, voltage may look good
but pump may not operate.