PAGE 25 of 84 HU-SOUTHWEST-1480 GAS-FIRED HUMIDAIRE UNIT
© SAMUEL JACKSON, INCORPORATED 2005 ALL RIGHTS RESERVED
ERROR 120
AIRFLOW SWITCH NOT OFF IN 24 HOURS:
The airflow switch (AFS) must be
exercised periodically to insure its proper operation. This error occurs if the Humidaire
Unit and fans have run continuously for over 24 hours. The Humidaire Unit will
NOT
shut down due to this ERROR; however, if the unit is turned off and an attempt is made
to restart it without turning off the fan, it will not start and will display ERROR 120. The
RESET button will
NOT
allow restart. The fan
MUST
be turned off and then back on to
allow the Humidaire Unit to start again.
If the operator is aware of the safety issues involved in bypassing the function of this
switch, a temporary software bypass is available by pressing the BYPASS button on the
error screen.
ALARM 121
MOMENTARY LOW AIR FLOW:
This ALARM is an indication that a choke of the
airflow is occurring. It is displayed when the air flow switch goes off and comes back on
in less than 3 seconds. If air flow is ok, limits may be set too tight. See Air Flow Switch
adjustment section in
TEST PROGRAM
section of manual for adjustment of limits.
ERROR 122
LOW AIR FLOW FOR MORE THAN 3 SECONDS:
This ERROR occurs when the
airflow is interrupted for more than 3 seconds. Verify proper airflow and adjust lower
limit of switch if necessary. See Air Flow Switch adjustment section in
TEST PROGRAM
section of manual for adjustment of limits.
ERROR 123
BAD VALU-HOUR CODE:
The Valu-Hour code entered is not valid for this Humidaire
at this time. This error occurs only on rental units.
ERROR 124
NO VALU-HOURS REMAIN:
All available Valu-Hours have been used. Contact the
factory to purchase more hours. This error occurs only on rental units.
ERROR 125
GAS LOW PRESSURE:
The gas pressure is constantly monitored by the Gas Low
Pressure Switch (GLPS) in the lower cabinet. This ERROR is triggered when the
pressure is below 1-1/2 PSI when the gas valves are open. Check for a closed gas cock or
ball valve in the gas line to the Humidaire Unit. For propane systems, check for
malfunction of the vaporizer. The GLPS is set to 45 inches water column (about 1.5 PSI).
