Honeywell TrueDRY DR90 Professional Installation Manual page 18

Troubleshooting (continued)
Service Diagnostic Tree
Running all the time, no water
16
REMOVE THE FILTER
IS THE EVAPORATOR
YES
COIL ICED UP?
NO
IS THE DISCHARGE
YES
AIR WARM?
NO
REMOVE BACK
DUCT PANEL
NO
IS THE AMBIENT
YES
TEMPERATURE AT
OR BELOW 50F?
IS THE
COMPRESSOR
VIBRATING?
YES
CAUTION:
COMPRESSOR
MAY BE
HOT
NO
TrueDry DR90/DR120 Dehumidification System 69-2690EFS—04
PROBABLE DEFROST
ISSUE WITH PROBE
OR WIRE
OUTSIDE OF
OPERATION RANGE
RETEST IN WARMER
AMBIENT TEMPERATURE
DEHUMIDIFIER SHOULD
BE WORKING.
SEE PERFORMANCE TEST
IN DR90/120 TECHNICIAN
FUNCTION TEST
PROBABLE SEALED
SYSTEM LEAK OR
COMPRESSOR FAILURE
PROBABLE RELAY OR
DEFROST ISSUE
M33757