4421 Tradition Trail ● Plano, Texas 75093 ● 972-964-2700 ● 800-836-7472
SP-ENG-211-000-19 Rev 1.0
15
|
P a g e
ALARM RECOVERY
……..
If the compressor is turned off due to an alarm, it will be able to restart after the
AC
anti short-cycle time
delay. (Parameter AC = 3 minutes)
Probe
alarm
P1
is cleared with no time delay after the fault is cleared.
Probe
alarm
P2
starts and stops with no time delay.
Temperature
alarm
HA
automatically clears as soon as the temperature returns to below 105°F (the
ALU
setpoint) -2°F = 103°F.
Temperature
alarm
LA
automatically clears as soon as the temperature returns to above 45°F (the
ALL
setpoint) +2°F = 47°F.
Temperature
alarm
HA2
automatically clears as soon as the condenser coils temperature returns to below 164°F.
Temperature
alarm
LA2
automatically clears as soon as the condenser coils temperature returns to above 60°F.
Temperature
alarm
CA
automatically clears as soon as the pressure returns to normal.
Preventa tive Maintenance
Air conditioners require regular cleaning of the condenser air inlet filter. Wash filter often if washable
using proper cleaning compound and back flushing the dirt out, or replace if not washable whenever it
appears physically dirty. Restriction to the flow of air over the condenser coil will degrade the
performance of the equipment, cause it to overheat, reduce cooling and can damage the compressor.
The overload switch in the compressor may cause the compressor to cycle if the condensing coil
pressure becomes too high due to air restriction. A further safety feature is the refrigerant high pressure
cut off switch which will stop the compressor if the condensing pressure becomes too high due restricted
condenser air flow or some other cause.
Restricted air flow due to neglecting a dirty filter will cause unit to repeatedly turn off and then turn back
on after it cools off.
An operation in this safety cycling mode will eventually damage the equipment and void the
warranty.
Refer to Field Serviceable Parts section in this manual for details on parts that can be changed to help
increase the uninterruptable life of the Air Conditioner.
Air Filter Service
Remove the air conditioner filter and wash if washable or replace if not washable. Dry thoroughly before
replacing. ISC Air Filter Treatment Spray in aerosol cans or spray bottle is recommended to enhance air
filter efficiency. Replacement filters are readily available from ISC Customer Service. DO NOT operate
the air conditioner without the air filter. Such operation will allow the condenser coil to become dirty and
lose efficiency, causing overheating and diminished cooling capacity. Periodically remove dust from the
components inside the condenser section of the air conditioner with a compressed air blower Very dirty
condensing coils must be back-flush cleaned using proper commercial coil cleaning compounds and
thorough back-flush rinsing. Refer to directions on the cleaning compounds selected. Acid wash is not
recommended as it reduces the life of the coil.
Note:
Do not use solvents to clean the programmable thermostat. Wipe with mild soap and water.
Condenser and Evaporator Fans
DELTA-T air conditioners use high efficiency, long life, sealed ball bearing fans engineered for optimum
performance that require no maintenance. Keep fan blades clean for optimal performance. Fans are
removable and attached by plug in connections.
Compressor
