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Troubleshooting (continued)
Service Diagnostic Tree
Running all the time, no water
T
u r
e
D
y r
D
R
9
0
A -
P
D
e
h
u
m
i d i
c i f
REMOVE THE FILTER
IS THE EVAPORATOR
YES
COIL ICED UP?
NO
IS THE DISCHARGE
YES
AIR WARM?
NO
REMOVE BACK
DUCT PANEL
t a
o i
n
S
s y
e t
m
5
0
0
7
7
4
7
0
0 -
0
1
NO
IS THE AMBIENT
YES
TEMPERATURE AT
OR BELOW 50F?
IS THE
COMPRESSOR
VIBRATING?
YES
CAUTION:
COMPRESSOR
MAY BE
HOT
NO
PROBABLE DEFROST
ISSUE WITH PROBE
OR WIRE
OUTSIDE OF
OPERATION RANGE
RETEST IN WARMER
AMBIENT TEMPERATURE
DEHUMIDIFIER SHOULD
BE WORKING.
SEE PERFORMANCE TEST
IN DR90-AP TECHNICIAN
FUNCTION TEST
PROBABLE SEALED
SYSTEM LEAK OR
COMPRESSOR FAILURE
PROBABLE RELAY OR
DEFROST ISSUE
M33757
33
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