CyberAiR DX Floor Mounted IOM
4.1.2 Humidifier
The steam cylinder has a limited lifetime and must
be replaced periodically. Because water conditions
and humidifier usage rates vary greatly, it is difficult
to establish intervals for changing the cylinder.
Individual maintenance schedules must be
determined for each location, based upon periodic
examination of the humidifier. A yellow LED on the
humidifier cabinet will flash four times in a repeating
pattern when the cylinder requires replacement.
NOTE
The yellow LED may illuminate during initial
start- up but it doesn’t necessarily mean the
cylinder needs to be replaced.
Refer to Section 4.3.4.4 and the humidifier
operator’s manual supplied under separate cover
for detailed instructions on changing the cylinder.
4.1.3 Condensate Pump
The condensate pump should be inspected semi-
annually and cleaned. Ensure that the float works
freely. Wipe the float with a wet cloth and detergent
to remove debris. Clean the tank bottom. Check that
the discharge line is open and water can pass
through it freely.
4.1.4 Condenser
For air-cooled condensers, clean the condenser coil
of all debris that will inhibit airflow. This can be done
with compressed air or with a commercial coil cleaner.
Check for bent or damaged coil fins and repair as
necessary.
On outdoor units in winter, do not permit snow to
accumulate on or around the condensing unit. Check
all refrigerant lines and capillaries for vibration
isolation and support as necessary. Check all
refrigerant and coolant lines for signs of leaks.
4.2
Troubleshooting
Turn off all power to the unit before conducting any troubleshooting procedures unless the procedure
specifically requires the system to operate. For troubleshooting purposes, the system may be operated with
the doors open by using vice-grip pliers to turn the shaft of the main power disconnect switch to the “On”
position.
NOTE: When the switch is turned on, high voltage will be present inside the cabinet.
Exercise
caution to prevent injury. Keep hands, clothing and tools clear of the electrical terminals and rotating
components. Ensure that your footing is stable at all times.
SYMPTOM
PROBABLE CAUSE
RECOMMENDATION
Suction Pressure Too Low
a. Loss of refrigerant (bubbles
in sight glass).
b. Expansion valve stuck or
obstructed (short cycle or
continuous running).
c. Clogged drier/strainer (feels cold).
d. Dirty air filters (reduced airflow).
Locate leak and repair.
Recharge system.
Remove and clean or replace valve.
Replace with new
drier/strainer. Clean/replace
filters.
Evaporator Coil Ices
a. Low airflow.
b. Temperature setting too low
c. Discharge air short circuiting
back to return.
d. Low refrigerant charge.
1. Check filters. Replace as needed.
2. Check for and clear any
obstructions across or in the (supply)
discharge airstream.
3. Check evaporator fan is operating
4. Check fan speed. Increase if
needed using the system controller.
Increase temperature set
point. (68°F min.).
Check discharge airflow orientation
in the conditioned space.
Find leak, repair and recharge system.
4-2
