Troubleshooting Tips - Friedrich Kuhl KCS12B10A Service Manual

Troubleshooting Tips

Problem
Unit does not operate.
Unit Trips Circuit Breaker or
Blows Fuses.
LCDI Power Cord Trips
(Reset Button Pops Out).
Unit Does Not Cool/ Heat Room
Sufficiently, or Cycles On And Off
Too Frequently.
54
TROUBLESHOOTING
Possible Cause
The power button is off or the set point tem-
perature is satisfied.
The LCDI power cord is unplugged.
The LCDI power cord has tripped (Reset
button has popped out).
The circuit breaker has tripped or the sup-
ply circuit fuse has blown.
There has been a local power failure.
Other appliances are being used on the
same circuit. (115 Volt only)
An extension cord is being used.
The circuit breaker or time-delay fuse is not
of the proper rating.
The LCDI power cord can trip (Reset but-
ton pops out) due to disturbances on your
power supply line.
Electrical overload, overheating, or cord
pinching can trip (Reset button pops out)
the LCDI power cord.
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.
• The return/ discharge air grille is
blocked.
• Windows or doors to the outside are
open.
• The temperature is not set at a cool
enough/ warm enough setting.
• The filter is dirty or obstructed.
• The indoor coil or outdoor coil is dirty
or obstructed.
• There is excessive heat or moisture
(cooking, showers, etc.) in the room.
• The temperature of the room you are
trying to cool is extremely hot.
Figure 717 (Troubleshooting Tips)
Possible Solution
Push the power button on and raise or lower temperature setting (as
appropriate) to call for operation.
Plug into a properly grounded 3 prong receptacle. (See Electrical Rating
Tables, Figure 206) for the proper receptacle type for your unit.
Press and release RESET (Listen for click. Reset button latches and
remains in.) Check that the green LED light is on to resume opera-
tion.
Reset the circuit breaker, or replace the fuse as applicable. If the
problem continues, contact a licensed electrician.
The unit will resume normal operation once power has been restored.
The unit requires a dedicated outlet circuit, not shared with other ap-
pliances.
Do NOT use an extension cord with this or any other air conditioner.
Replace with a circuit breaker or time-delay fuse of the proper rat-
ing. (See Electrical Rating Tables, Figure 206) for the proper circuit
breaker/ fuse rating for your unit. If the problem continues, contact a
licensed electrician.
Press and release RESET (Listen for click. Reset button latches and
remains in.) Check that the green LED light is on to resume normal
operation.
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.
• Ensure that the return and/ or discharge air paths are not blocked
by curtains, blinds, furniture, etc.
• Ensure that all windows and doors are closed.
• Adjust the Temperature control to a cooler or warmer setting as
necessary.
• Clean the filter, (see Routine Maintenance), or remove obstruction.
• Clean the coils, (see Routine Maintenance), or remove obstruction.
• Be sure to use exhaust vent fans while cooking or bathing and, if
possible, try not to use heat producing appliances during the hot-
test part of the day.
• Allow additional time for the air conditioner to cool off a very hot
room.