Troubleshooting Procedures
!
WARNING
To avoid electrical shock, personal injury, or death, disconnect power before servicing unless testing requires it.
RS4110001 Rev. 0
17
Air Conditioning Voltage Limits
This unit operates on a 115 VAC, 60 Hz power source.
Minimum voltage required to operate this unit is 103.5
VAC and maximum voltage is 126.5 VAC.
Low Voltage
Low voltage is a common cause of trouble during
operation of any room air conditioner
Improper voltage can result in one or more of the
following:
1. Unit will not operate.
2. Compressor motor cycling on motor protector.
3. Premature failure of motor protector.
4. Blown fuses.
5. Premature failure of compressor or fan motor.
6. Noticeable dimming of lights when unit is operating.
7. Evaporator icing, caused by low voltage reducing fan
speed resulting in an inadequate air flow over the
evaporator.
Low voltage will result from inadequately wired circuit,
extension cords, and loose fuses or connections in the
power supply. Voltage supplied by the electrical
company can also result in low power, (responsibility of
local power company.
All units will operate and run on minimum voltage stated
in "Air Conditioning Voltage Limits", and will perform
satisfactorily if voltage remains constant. Low voltage
caused by defective wiring will not remain constant under
load.
Testing for low voltage, use a reliable voltmeter with
sufficient capacity to measure the required voltage.
Verify voltage at electric power entry point and at
electrical outlet serving the unit Verify readings with the
unit off, while the unit is starting, and again while the unit
is operating. Lowest reading should not drop below the
lowest minimum value.
High Voltage
High voltage can be equally troublesome, causing motor
to overheat, cycle on their protectors, or break down
electrically. This problem can only be solved by the local
power company.
Electronic Control
Control is not repairable. If any component in the control
is defective, entire control must be replaced.
NOTE: Repair or replace any malfunctioning line voltage
component before testing or replacing the
electronic control. Do not assume service
problem is directly caused by the electronic
control system. A line voltage component
(including power cord and wiring) that has
opened, shorted, grounded or otherwise
malfunctioned, may have created a service
problem.
