Справочник Пользователя для Friedrich PTAC - R410A

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The effi ciency of the compressor is low

Whether the cooling (heating) load is suitable

Refrigeration system is blocked

Refrigerant is insuffi cient or leaking

Condenser can’t discharge smoothly

The air tightness in room is not good. People 

come in and go out frequently. There are 

heating devices in the room when A/C is cooling

The fan’s capacitor is broken

The controller has malfunction

The compressor’s motor is burned out

Supply voltage is unstable

Too much refrigerant

Outdoor temperature is too high

At the time of heating, the electric heater

can’t run

Compressor 

isn’t running 

(controller is 

with output)

Call for fan 

motor but fan 
motor will not 

come on

A/C on. No 

cooling (or 

heating)

The motor winding is of broken circuit or short 

circuit or the built in temperature limiter device 

in open circuit due to overheat.

Wrong wire connection

The compressor capacitor is broken; wrong wire 

connection

The compressor is jammed or blocked

Check leakage, carry out vacuum-pumping after repairing 
leakage and charge refrigerant according to requirements

You can install the rain-proof and sun-proof board. If the 

cooling air is still insuffi cient, you are suggested

to replace the A/C

1. the wire is loosened;  2. thermal fuse is broken; 

3. temperature limiter is damaged;  4. electric heater is 

damaged;  5. controller is broken. correct the wore correctly 

or replace those parts which has malfunction.

Replace fan’s capacitor with the same

mode and specifi cation

Check the circuit and connect the wire correctly

according to the electic circuit diagram

Replace the controller

Keep the air tightness well. Try not to use the electic 

appliances with a large quantity of heat

Check with a multimeter if the enclosed motor windings of 

compressor is with short or broken circuit or earthing. If so, it 

is needed to replace it with the same type and specifi cations.

Knock the compressor housing with a rubber bar or with 

a hammer padding with a wood, the compressor might be 

shocked and run. If not, change the compressor.

Check whether the system is blocked by observing the 

condensation of the evaporator and the pressure value of 
the high pressure manometer, and then take measures to 

deal with the system.

Check the preset cooling (heating) load

Check the reason and correct it.

Replace those parts which has malfunction

Replace capacitor; connect the wire correctly

according to the electric circuit diagram

Get rid of the obstacle

Replace the compressor

Release the redundant refrigerant in system