Service & Parts Manual (2019, 2020, 2021, 2022)
Table Of Contents
59 PB
TROUBLESHOOTING
Figure 711 (Troubleshooting Tips)
Problem Possible Cause Possible Solution
Unit does not operate.
The power button is off or the set point
temperature is satised.
Push the power button on and raise or lower
temperature setting (as appropriate) to call for
operation.
The LCDI power cord is unplugged.
Plug into a properly grounded 3 prong receptacle.
(See Electrical Rating Tables, Figure 205) for the
proper receptacle type for your unit.
The LCDI power cord has tripped (Reset
button has popped out).
Press and release RESET (Listen for click. Reset
button latches and remains in.) to resume opera-
tion.
The circuit breaker has tripped or the
supply circuit fuse has blown.
Reset the circuit breaker, or replace the fuse as
applicable. If the problem continues, contact a
licensed electrician.
There has been a local power failure.
The unit will resume normal operation once power
has been restored.
Unit Trips Circuit Breaker or
Blows Fuses.
Other appliances are being used on the
same circuit. (115 Volt only)
The unit requires a dedicated outlet circuit, not
shared with other appliances.
An extension cord is being used.
Do NOT use an extension cord with this or any
other air conditioner.
The circuit breaker or time-delay fuse is
not of the proper rating.
Replace with a circuit breaker or time-delay fuse
of the proper rating. (See Electrical Rating Tables,
Figure 205) for the proper circuit breaker/ fuse rat-
ing for your unit. If the problem continues, contact
a licensed electrician.
LCDI Power Cord Trips
(Reset Button Pops Out).
The LCDI power cord can trip (Reset
button pops out) due to disturbances on
your power supply line.
Press and release RESET (Listen for click. Reset
button latches and remains in.) to resume normal
operation.
Electrical overload, overheating, or cord
pinching can trip (Reset button pops out)
the LCDI power cord.
Once the problem has been determined and
corrected, press and release RESET (Listen for
click. Reset button latches and remains in.) to
resume normal operation.
NOTE: A damaged power supply cord must be replaced with a new power supply cord obtained from the product
manufacturer and must not be repaired.
Unit Does Not Cool/ Heat Room
Sufciently, or Cycles On And Off Too
Frequently.
• The return/ discharge air grille is blocked.
• Ensure that the return and/ or discharge air paths are not
blocked by curtains, blinds, furniture, etc.
• Windows or doors to the outside are open. • Ensure that all windows and doors are closed.
• The temperature is not set at a cool
enough/ warm enough setting.
• Adjust the Temperature control to a cooler or warmer
setting as necessary.
• The lter is dirty or obstructed.
• Clean the lter, (see Routine Maintenance), or remove
obstruction.
• The indoor coil or outdoor coil is dirty or
obstructed.
• Clean the coils, (see Routine Maintenance), or remove
obstruction.
• There is excessive heat or moisture (cook-
ing, showers, etc.) in the room.
• Be sure to use exhaust vent fans while cooking or
bathing and, if possible, try not to use heat producing
appliances during the hottest part of the day.
• The temperature of the room you are trying
to cool is extremely hot.
• Allow additional time for the air conditioner to cool off a
very hot room.