Daikin Condensing Unit DX13SA0301AD

This unit is equipped with an aluminum tube evaporator coil.

The safest way to clean the evaporator coil is to simply flush the coil with water. This cleaning practice remains as the recommended cleaning method for both copper tube and aluminum tube residential cooling coils.

An alternate cleaning method is to use one of the products listed in the technical publication TP-109 (shipped in the literature bag with the unit) to clean the coils. The cleaners listed are the only agents deemed safe and approved for use to clean round tube aluminum coils. TP-109 is available on the web site in Partner Link > Service Toolkit.

Was the coil flushed with water?

Select the cleaning method used

NOTE: Ensure coils are rinsed well after use of any chemical cleaners.

Was the coil rinsed well after cleaning?

WARNING: HIGH VOLTAGE! Disconnect ALL power before servicing or installing. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.

Remove the leads from the compressor terminals. See warnings S-17 before removing compressor terminal cover.

Fuse, circuit breaker, ground fault protective device, etc. has not tripped.

Using an ohmmeter, test continuity between terminals S-R, C-R, and C-S, on single phase units or terminals T2, T2 and T3, on 3 phase units.

If either winding does not test continuous, replace the compressor.

NOTE: If an open compressor is indicated, allow ample time for the internal overload to reset before replacing compressor.

Enter the reading of the ohmmeter

Did the compressor pass the resistance test?

Sign off on the resistance test

Voltage reading at motor connections L and N

Is 230 volts present at motor connections L and N?

If 230 volts is not present, check the line voltage circuit to the motor.

Voltage reading from terminal C to either terminal 1, 2, 3, 4, or 5

Is 24 volts present from terminal C to the selected terminal?

If no voltage, check 24 volt circuit to motor.

If voltage was present in steps 1 and 2, the motor has failed and will need to be replaced.

Note: When replacing motor, ensure the belly band is between the vents on the motor and the wiring has the proper drip loop to prevent condensate from entering the motor.

WARNING: Disconnect ALL power before servicing.

Remove the wiring from the control terminals.

Using an ohmmeter, test for continuity across the normally closed contacts. No reading indicates the control is open.

Make sure the limits are cool before testing.

If found open, replace. Do not wire around.

Sign off on the heater limit control check

Warning: This test requires trained personnel with PPE!

Did the compressor amperage go up or down at least 25 percent?

If step one does not give the expected results, shut unit off.

Enter the voltage applied to the unloader molded plug leads

Did you hear a click as the solenoid pulls in?

Did you hear another click as the unloader returns to its original position?

If clicks can’t be heard, shut off power and remove the control circuit molded plug from the compressor.

Enter the unloader coil resistance