PROBLEM

 

POSSIBLE CAUSE

TO CORRECT

 

 

 

 

 

 

Dirty filter.

Clean as recommended in Owner’s Manual.

Evaporator coil

 

Restricted air flow.

Check for dirty or obstructed coil - clean as re-

 

 

quired.

freezes up.

 

Inoperative thermostat.

Test for shorted thermostat or stuck contacts.

 

 

Short of refrigerant.

De-ice coil and check for leak.

 

 

Inoperative fan motor.

Test fan motor and replace if inoperative.

 

 

Partially restricted capillary.

De-ice coil. Check temperature differential across

 

 

 

coil. Touch test coil return bends for same tempera-

 

 

 

ture. Test for low running current.

PROBLEM

 

POSSIBLE CAUSE

TO CORRECT:

 

 

 

 

 

 

Excessive heat load.

Unit undersized. Test cooling performance of unit.

Compressor runs

 

 

Replace with larger unit.

 

Restriction in line.

Check for partially iced coil. Check temperature split

continually.

 

 

 

across coil.

 

 

 

 

 

Refrigerant leak.

Check for oil at silver soldered connections. Check

Does not cycle off.

 

 

for partially iced coil. Check split across coil. Check

 

 

for low running amperage.

 

 

Thermostat contacts stuck

Check operation of thermostat. Replace if contacts

 

 

 

remain closed.

 

 

Thermostat incorrectly wired.

Refer to appropriate wiring diagram.

 

 

 

 

PROBLEM

POSSIBLE CAUSE

TO CORRECT:

 

 

 

 

Thermostat contacts stuck.

Replace thermostat.

Thermostat does not

Thermostat set at coldest point.

Turn to higher temperature setting to see if the unit

turn unit off.

 

cycles off.

 

Incorrect wiring.

Refer to appropriate wiring diagram.

 

Unit undersized for area to be cooled.

Refer to Sizing Chart.

 

 

 

PROBLEM

POSSIBLE CAUSE

TO CORRECT

 

 

 

 

 

Overload inoperative. Opens too soon.

Check operation of unit. Replace overload if

 

 

system operation is satisfactory.

 

Compressor attempts to start before

Allow a minimum of two (2) minutes for pressures

 

system pressures are equalized.

to equalize before attempting to restart. Instruct

 

 

customer of waiting period.

Compressor attempts

Low or fluctuating voltage.

Check voltage with unit operating. Check for other

 

appliances on circuit. Air conditioner should be on

to start, or runs for

 

separate circuit for proper voltage, and be fused

short periods only.

 

separately.

Cycles on overload.

Incorrect wiring.

Refer to appropriate wiring diagram.

 

 

Shorted or incorrect capacitor.

Check by substituting a known good capacitor of

 

 

correct rating.

 

Restricted or low air flow through

Check for proper fan speed or blocked condenser.

 

condenser coil.

Check for kinked discharge line or restricted condenser.

 

Compressor running abnormally hot.

Check amperage.

 

 

 

 

PROBLEM

POSSIBLE CAUSE

TO CORRECT

 

 

 

Thermostat does not

Loss of charge in thermostat bulb.

Place jumper across thermostat terminals to check

 

if unit operates. If unit operates, replace thermostat.

turn unit on.

 

 

 

 

 

 

Loose or broken parts in thermostat.

Check as above.

 

Incorrect wiring.

Refer to appropriate wiring diagram.

 

 

 

37

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Image 37
Friedrich racservmn service manual Problem Possible Cause To Correct
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racservmn specifications

Friedrich Racervmn is an innovative name in the realm of precision engineering, making significant strides in the development of advanced technologies for various industries. This company stands out due to its commitment to creating high-quality, reliable, and efficient products that cater to the diverse needs of its clientele.

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In summary, Friedrich Racervmn is a leader in precision engineering, recognized for its advanced technologies, innovative manufacturing processes, commitment to sustainability, and outstanding customer service. The company’s focus on quality and innovation positions it as a vital player in the modern industrial landscape, continuously pushing the envelope toward a more technologically advanced and environmentally conscious future.
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