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WAECO USA, Inc.
Tel. (860) 664-4911 • Fax. (860) 664-4912 • www.waecousa.com
Contents, specifications and availability are subject to change without notice.
LED BLINK
SYMPTOM
TEST / DIAGNOSIS
CORRECTIVE
CODE
ACTION
Compressor and fan cycle
Digital thermostat control setting
Re-program digital control, lower-
but box not cold enough
too warm or control is defective
ing set point (SP) and “HI” and
“LO” settings (see manual) or
replace control
Analog thermostat set too warm
Adjust control or replace
or defective
Evaporator too small for box
Call WAECO USA (860.664-4911)
Thermostat tube touching evaporator
See manual, correct
Compressor and fan runs,
Inadequate air flow to condensing
Remove blockage and/or
evaporator frosts, but box
unit
improve circulation
not cold enough
Refrigerant undercharge-only part
Call WAECO USA (860.664-4911)
of the evaporator is frosting*
Refrigerant overcharge-evaporator
Call WAECO USA (860.664-4911)
is fully frosted plus frost continues
along tube set beyond rubber
insulating sleeve
Partial clog in refrigerant circuit
Call WAECO USA (860.664-4911)
only part of the evaporator is
frosting
3
Box insulation is inadequate or
Re-insulate. Contact local dealer
box too large
for assistance. Find local dealer
online: www.waecousa.com
3,4,5
Condensing unit in very hot area
Relocate unit, remove blockage
and/or condenser fins blocked
provide better airflow, review
Duct Kit section of this manual
Thermostat tube touching evaporator
See manual, correct
Compressor and fan run
No refrigerant in system: Loose
Call WAECO USA first. Decision to
continuously, no cooling at all
couplings, defective component(s)
repair locally or return entire
punctured evaporator, broken
system (evaporator & condensing
tubing. “Hiss” may be audible
unit) to factory will be made
at evaporator when compressor
before proceeding.
is running
Complete clog inside refrigerant
Call WAECO USA for assistance
circuit: no audible “hiss” at
in confirming this diagnosis and
evaporator while compressor
best way to proceed
is running
*NOTE: FEDERAL LAW PROHIBITS SERVICING OF THIS REFRIGERANT CIRCUIT BY NON-CERTIFIED OPERATORS.
PLEASE CALL WAECO USA’S TECHNICAL SERVICE DEPARTMENT FOR ASSISTANCE.
TROUBLESHOOTING
