Service & Parts Manual (Non Q) (2019, 2020, 2021, 2022)

71 PB
Problem Possible Cause Possible Solution
Unit does not operate.
The power button is off or the set point tem-
perature is satised.
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 206) 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 operation.
The circuit breaker has tripped or the sup-
ply 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, Fig-
ure 206) for the proper circuit breaker/ fuse rating 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 but-
ton 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 cor-
rected, 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
Sufciently, 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, furni-
ture, 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
(cooking, 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.
TROUBLESHOOTING
Troubleshooting Tips
Figure 717 (Troubleshooting Tips)