Inadequate vapor barrier in building structure, particularly floors.Ĭheck compressor wiring. Operate in "Fan-Auto (MoneySaver)" position. Insufficient air circulation in air conditioned area.Īdjust louvers for best possible air circulation Reseal, reinstall and check.įan blade and slinger ring improperly positioned.Īdjust fan blade to 1/2" clearance from condenser coil.
FRIEDRICH AIR CONDITIONER MODEL NUMBERS CRACKED
Partial loss of charge in thermostat bulb causing a wide differential.Įvaporator drain pan cracked or obstructed.ĭetach shroud from pan and coil. Insert plug and depress "Cool" and "Fan Auto (MoneySaver)" buttons. (Applicable models.)ĭisconnect plug from outlet. (automatic operation)Īnticipator (resistor) wire disconnected at thermostat or system switch.Īnticipator (resister shorted or open). Thermostat bulb touching thermostat bulb support bracket.Īdjust bulb bracket. Tubular insulation missing from top of thermostat bulb. Plenum gasket not sealing, allowing discharge air to short cycle thermostat.Ĭlean and advise customer of periodic cleaning of filter. Poor installation resulting in rain entering room.ĭirty evaporator coil clean. Uneck assemoiy ana parts tor looseness, ruDDing and rattling.Įvaporator drain pan broken or cracked. Improperly mounted or loose cabinet parts. Check that compressor mounting parts are not missing. If unit operates, replace thermostat.Ĭheck that compressor grommets have not deteriorated. Place jumper across thermostat terminals to check if unit operates. Restricted or low air flow through condenser coil.Ĭheck for proper fan speed or blocked condenser.Ĭheck for kinked discharge line or restricted condenser. Air conditioner should be on separate circuit for proper voltage, and be fused separately.Ĭheck by substituting a known good capacitor of correct rating. Instruct customer of waiting period.Ĭheck voltage with unit operating. Replace overload if system operation is satisfactory.Ĭompressor attempts to start before system pressures are equalized.Īllow a minimum of two (2) minutes for pressures to equalize before attempting to restart. Cycles on overload.Ĭheck operation of unit. Turn to higher temperature setting to see if the unit cycles off.Ĭompressor attempts to start, or runs for short periods only. Check for low running amperage.Ĭheck operation of thermostat. Check temperature split across coil.Ĭheck for oil at silver soldered connections.Ĭheck for partially iced coil.
Replace with larger unit.Ĭheck for partially iced coil. Touch test coil return bends for same temperature. Check temperature differential across coil. Test fan motor and replace if inoperative.ĭeice coil. Test for shorted thermostat or stuck contacts. Reconnect per wiring diagram.Ĭheck for dirty or obstructed coil clean as required. Loose or disconnected wiring at switch or other components.Ĭheck wiring and connections.
Test for continuity in each switch position. Check for shorts in unit wiring and components. Instruct customer on use of this feature.Ĭheck amperage draw against nameplate. Use high fan speed.įresh air or exhaust air door open on applicable models.Ĭlose doors. Poor air circulation in area being cooled.Īdjust discharge air louvers. Test thermostat and replace if necessary.ĭirty or plugged condenser or evaporator coil. (Be sure internal overload has had time to reset.) Test fan motor and replace if inoperative. Test capacitor and replace if inoperative.
Test overload protector and replace if inoperative. If compressor starts, add starting components. Test thermostat and replace if inoperative.Ĭompressor hums but cuts off on overload. Thermostat not set cold enough or inoperative. 115 volt and 230 volt units will operate at 10% voltaqe variance
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