Friedrich WallMaster WCVT12B30A handleiding

Airco

Friedrich

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Handleiding

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TROUBLESHOOTING

Troubleshooting Tips

Problem Possible Cause Possible Solution

Compressor runs continually &

does not cycle off

Excessive heat load

Unit undersized. Test cooling performance & replace with larger unit if

needed. See sizing chart.

Restriction in line Check for partially iced coil & check temperature split across coil

Thermistor shorted Replace thermistor or electronic control board

Electronic control

board does not turn unit off

Compressor relay contacts stuck Replace electronic control board

Incorrect wiring Refer to appropriate wiring diagrams

Unit undersized for area to be cooled Refer to industry standard sizing chart

Defective thermistor Replace thermistor or electronic control board

Compressor runs for short

periods only.

Incorrect wiring Refer to appropriate wiring diagram

Shorted or incorrect capacitor Test capacitor and replace if needed.

Restricted or low air ﬂow through con-

denser coil or evaporator coil

Check for proper fan speed or blocked coils. Correct as needed.

Compressor running abnormally hot

Check for kinked discharge line or restricted condenser. Refrigerant over-

charge. Check amperage, connections.

Unit does not turn on

No power

Check power supply. Check LCDI plug. Check wire connections. Check if

panel is locked.

Incorrect wiring Refer to appropriate wiring diagram.

Defective thermistor Replace thermistor or electronic control board.

Noisy operation

Poorly installed Refer to Installation Manual for proper installation.

Fan blade striking chassis Reposition - adjust motor mount.

Compressor vibrating

Check that compressor grommets have not deteriorated. Check that com-

pressor mounting parts are not missing.

Improperly mounted or loose cabinet

parts refrigerant tubes

Check assembly & parts for looseness, rubbing & rattling pipes, etc.

Water Leaks into Room

Evaporator drain pan overﬂowing Clean obstructed drain trough.

Condensation forming underneath base

pan

Evaporator drain pan broken or cracked. Reseal or replace. No chassis

gasket installed. Install chassis gasket.

Poor installation resulting in rain enter-

ing the room

Check installation instructions. Reseal as required.

Condensation on discharge grille

louvers

Dirty evaporator coil. Clean coils (See Routine Maintenance) Environmental

phenomena: point supply louvers upward. Put on high fan.

Chassis gasket not installed Install gasket, per Installation manual.

Downward slope of unit is too steep

inward

Refer to installation manual for proper installation.

Water “spitting” into room

Sublimation:

When unconditioned saturated, outside

air mixes with conditioned air, conden-

sation forms on the cooler surfaces

Ensure that foam gaskets are installed in between window panes & in

between the unit & the sleeve. Also, ensure that fresh air/exhaust vents (on

applicable models) are in the closed position & are in tact.

Downward pitch of installation is too

steep towards back of unit

Follow installation instructions to ensure that downward pitch of installed

unit is no less than 1/4” & no more than 3/8”

Restricted coil or dirty ﬁlter

Clean & advise customer of periodic cleaning & maintenance needs of entire

unit

Excessive moisture

Insufﬁcient air circulation thru area to be

air conditioned

Adjust louvers for best possible air circulation

Inadequate vapor barrier in building

structure; particularly ﬂoors.

Advise customer

Figure 606

Bekijk gratis de handleiding van Friedrich WallMaster WCVT12B30A, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.