Goodman Mfg RT6100004R13 manual 17B Ground Test, 17D Operation Test, Testing Compressor Windings

SERVICING

1. Remove the leads from the compressor terminals.

See warnings S-17 before removing compressor terminal cover.

2.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.

C

OHMMETER S R

COMP

TESTING COMPRESSOR WINDINGS

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.

S-17B GROUND TEST

If fuse, circuit breaker, ground fault protective device, etc., has tripped, this is a strong indication that an electrical problem exists and must be found and corrected. The circuit protective device rating must be checked, and its maximum rating should coincide with that marked on the equipment nameplate.

With the terminal protective cover in place, it is acceptable to replace the fuse or reset the circuit breaker ONE TIME ONLY to see if it was just a nuisance opening. If it opens again, DO NOT continue to reset.

Disconnect all power to unit, making sure that all power legs are open.

1.DO NOT remove protective terminal cover. Disconnect the three leads going to the compressor terminals at the nearest point to the compressor.

2.Identify the leads and using a Megger, Hi-Potential Ground Tester, or other suitable instrument which puts out a voltage between 300 and 1500 volts, check for a ground separately between each of the three leads and ground (such as an unpainted tube on the compressor). Do not use a low voltage output instrument such as a volt- ohmmeter.

HI-POT

COMPRESSOR GROUND TEST

3.If a ground is indicated, then carefully remove the com- pressor terminal protective cover and inspect for loose leads or insulation breaks in the lead wires.

4.If no visual problems indicated, carefully remove the leads at the compressor terminals.

WARNING

Damage can occur to the glass embedded terminals if the leads are not properly removed. This can result in terminal and hot oil discharging.

Carefully retest for ground, directly between compressor terminals and ground.

5. If ground is indicated, replace the compressor.

S-17D OPERATION TEST

If the voltage, capacitor, overload and motor winding test fail to show the cause for failure:

1.Remove unit wiring from disconnect switch and wire a test cord to the disconnect switch.

NOTE: The wire size of the test cord must equal the line wire size and the fuse must be of the proper size and type.

2.With the protective terminal cover in place, use the three leads to the compressor terminals that were discon- nected at the nearest point to the compressor and connect the common, start and run clips to the respective leads.

3.Connect good capacitors of the right MFD and voltage rating into the circuit as shown.

4.With power ON, close the switch.

WARNING

Line Voltage now present.

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