Friedrich hazardgarg r-410a Manuale Utente

Compressor 

attempts to 

start, or runs for 

short periods 

only. Cycles on 

overload.

Compressor attempts to start 

before system pressures are 

equalized.

Allow a minimum of 3 minutes to allow pressures 

to equalize before attempting to start. 

Low or fluctuating voltage.

Check voltage with unit operating. Check for 

other appliances on the circuit. Unit should be on 

separate circuit for proper voltage, and be fused 

separately

Incorrect wiring

Connect per appropriate wiring diagram

Shorted or incorrect capacitor

Replace capacitor

Restricted or low air flow through 

condenser coil

Check motor fan blade.

Compressor running abnormally 

hot

Check for refrigerant restriction, blocked airflow, 

loose wires at compressor terminals  and fan 

motor capacitor voltage.

Overload opens too soon.

Change compressor if all other corrections above 

are normal.

Compressor does 

not start - fan 

motor runs.

Thermostat contacts not closing.

Check continuity of thermostat at coldest setting. If 

compressor runs, replace thermostat.

Low voltage supply. 

Check for nameplate voltage. Provide proper 

voltage.

Switch (On-Off) inoperative.

Test for continuity.

Defective capacitor.

Test with analyzer, replace if needed.

Compressor internal overload 

open.

Check voltage at compressor terminals. If voltage 

is satisfactory, replace compressor.

Solid state relay open.

Replace relay.

Open or shorted compressor 

windings.

Check windings for continuity and resistance. If 

open, replace compressor.

Does not cool, or 

cools only slightly.

Thermostat open or inoperative.

Set to coldest position. Test thermostat and 

replace if necessary.

Dirty air filter.

Clean as recommended in Owner’s Manual.

Dirty or plugged condenser or 

evaporator coil.

Clean coils.

Poor air circulation in area being 

cooled.

Adjust air louvers. Check application. Check for 

dirty filter or evap coil. Check fan motor. Correct as 

needed.

Low capacity - undercharge.

Check for leak and make necessary repairs.

Compressor not pumping properly. Replace compressor.

Your Friedrich Hazardgard is designed not to freeze with outdoor temperatures as low as 45°F (7°C). If the indoor coil should 

ice over while cooling, set the thermostat to the warmest position until the ice on the coil is gone. Setting the thermostat to a 

slightly warmer position will probably keep ice from forming on the coil. A dirty filter will contribute to icing.

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