
18
920-198-00
Troubleshooting tips
Power failure
If you have a power failure, the unit's auto-restart feature will resume
operation in the selected mode prior to the power failure.
Won't cool?
Ifyourairconditioneroperates,butwon’tcool;checkto seeifthe controls
are properly set. Check the filter and clean thoroughly if needed. Check
tosee if thevent door is closed. Check to see if the chassis sealgasket is
installed (refer to installation instructions).
Won't run?
Make sure the power cord is plugged in completely. Check for a bad fuse,
tripped breaker or tripped LCDI Device. Refer to page 3 for LCDI reset
instructions and to confirm proper fuse size.
For QuietMaster Programmable models only:
You can reset the circuit board by pressing the “Moneysaver” button and
the “Check Filter” button at the same time. The LED (small red light) for
the Check Filter will begin blinking. Once this occurs, turn the unit off by
pressingtheOn/Offbuttononceandthenunplugtheunit.Finally,plugthe
unit back in and turn it on by pressing the On/Offbuttononce.Allsettings
revert back to the factory default settings.
This is a warm weather appliance
Yourairconditionerisdesigned to cool in warmweather whentheoutside
temperature is above 60°F (16°C) and below 115°F (46°C), so it won't
cool a room if it is already cool outside. If you want to cool a room in the
spring or fall, touch Fan Only and set the Fresh Air/Exhaust control to
Fresh Air. This will bring in a supply of cooler outside air.
Condensation is normal
Airconditionersactuallypumptheheatandhumidityfromyourroomtothe
outsideair.Humiditybecomeswater,andyourairconditionerwillusemost
ofthewatertokeeptheoutsidecoilcool.Ifthereisexcessivehumidity,there
may be excess water that will drip outside. This is normal operation.
Frosting
This usually occurs because ofinsufficientairflow across thecoils, a dirty
filter,cooldampweather,orallofthese.Setunitto Fan Onlyandthefrost
will disappear.Setting the thermostat a littlewarmerwill probablyprevent
the frosting from recurring.
Noises
All air conditioners make some noise. Friedrich QuietMaster®units are
designed to operate as quietly as possible. An air conditioner mounted in
a wall is quieter than one mounted in a window. It is important to ensure
that the chassis seal gasket is properly installed (refer to installation
instructions).
Cleaning your air conditioner
The decorative front andthe cabinetcanbe cleanedwith warm waterand
a mild liquid detergent. The indoor coil can be vacuumed with a dusting
attachmentifitappearstobedirty.Theoutdoorcoilcanbegentlysprayed
with a hose if you can get to it. If not, you might call your dealer for a
more thorough cleaning when needed. The air filter should be inspected
weekly and cleanedif needed byvacuumingwitha dust attachment or by
cleaning in the sink using warm water and a mild dishwashing detergent.
Dry the filter thoroughly before reinstalling. Use caution– the coil surface
can be sharp.
Heat pumps operate differently
If your unit is a "Y", or heat pump model, there are some things that you
will want to be aware of.
Some functions of a heat pump differ from your unit when it is used for
heating:
1. It is normal for ice to form on the outdoor coil of the heat pump.
Moisture in the outside air, passing over the coil when very cold,
will form ice.
2. Iftheoutdoortemperaturedropsbelow37°F(3°C),yourheatpump
will automatically turn on the electric resistance heat. When the
temperature rises to 40°F (4°C), the compressor will resume the
heat pump operation. If your unit is a 115 volt model (YS09), it is
designed for use in warmer climates and has no electrical heat
feature, and will not provide adequate heat below 37°F (3°C).
Available Accessories
DC Drain Kit - Part No. 01900235
In some installations, excess condensate water caused by extremely humid
conditions, may result in an undesirable water drip such as on a patio or
overan entryway. MODELDC-2DRAIN KIT (Part No.01900-235)can be
installed to drain the excess condensate.
Window Installation Kits
TwinTemporHeat/Coolroomairconditionersareshippedwithout window
mounting hardwarebecause theyareseldom mountedin thewindow.For
those instances when these units are being mounted in a window, there
arewindowinstallationkitsavailable.Dependinguponthechassissizefor
which an installation kit is desired, order:
• WIKS for Small Chassis (ES, YS models)
• WIKM for Medium Chassis (EM, YM models)
• WIKL for Large Chassis (EL, YL models)
THESE ACCESSORIES CAN BE ORDERED FROM YOUR FRIEDRICH DEALER.