Self Diagnostic Codes - Airrex HSC-18PLUS Operating Instructions And Parts Manual

Operating Instruction & Parts Manual

SELF DIAGNOSTIC CODES

The alarm light is activated if abnormal operation occurs, and an error code is displayed on the control panel.
In this case, the compressor will stop operating.
Error Code Problem
Blocked air filter
High pressure
Blocked / kinked exhaust duct
Ambient temperature is too high
Verify Electrical
Low pressure
Refrigerant may be low
If the AF sensor is short
circuited or cut 'E3&1'
AF sensor
displayed and the 'Error'
LED will be on.
If the RT snesor is short
circuited or cut 'E3&2'
RT sensor
displayed and the 'Error'
LED will be on.
If the OT snesor is short
circuited or cut 'E3&3'
OT sensor
displayed and the 'Error'
LED will be on.
Water tank is full
Water full
Evaporator is below 25 ℉
Anti-Freezing
(-4 ℃) due to being used in a
alarm
low ambient temperature area.
Water tank is not
Align water tank
positioned correctly
Fire alarm signal is received
Fire alarm signal
from Fire alarm system.
rev0
Cause
Ensure exhaust duct is not
blocked / kinked
Do not use the air conditioner
if ambient temperature is
higher than 113℉
Clean Filters and Coils
Verify Power (Voltage/Amps)
Check Filters Evaporator/Condenser
Check Evaporator/Condenser Coils
Check refrigerant level and/or
refrigerant leak.
Exchange temperature sensor
(Contact Airrex U.S.A. at 1-888-
Exchange temperature sensor
(Contact Airrex U.S.A. at 1-888-
Exchange temperature sensor
(Contact Airrex U.S.A. at 1-888-
Empty the water tank
Do not use the unit in an ambient
temperature less than 72℉ (22℃).
Check refrigerant level.
Place the water tank
Reset unit by pushing and
holding the "OFF TIMER" button
for 5 seconds.
Corrective Action
535-8841)
535-8841)
535-8841)
in right position