Troubleshooting Chart - Champion R Series Operation & Service Manual

Troubleshooting Chart

Always disconnect unit from power supply and relieve all pressure from air tank before performing any
maintenance. Failure to do so may result in personal injury or death. "Lock Out" or "Tag Out" all power
sources.
Never operate unit without belt guard in place.
Never use gasoline or flammable solvent on or around compressor unit. Explosion may result.
Symptom
Motor will not start.
Starter trips repeatedly.
Tank pressure builds up slowly.
Tank pressure builds up quickly.
Discharge pressure relief valve
pops off while compressor is
running.
Compressor will not unload
(Units with head unloaders)
Excessive belt wear.
Compressor runs hot.
R-Series Electric
Operation & Service
Possible Cause(s)
1. Main switch and fuses open.
2. Starter magnetic coils open.
3. Thermal overload tripped.
4. Defective pressure switch-contacts
will not close
5. Low voltage.
1. Improperly adjusted pressure switch.
2. Faulty check valve.
3. Incorrect fuse size or magnetic
starter coil.
4. Low voltage.
5. Defective motor.
1. Air leaks.
2. Dirty air filter.
3. Defective compressor valves
1. Excessive water in tank.
1. Wrong pressure switch setting.
2. Defective ASME relief valve.
1. Wrong pilot valve setting.
2. Defective pilot valve.
3. Lack of air to pilot valve.
1. Pulley out of alignment.
2. Belts too tight or too loose.
1. Improper flywheel rotation
2. Defective compressor valves.
3. Dirty air filter.
4. Dirty cylinder and/or intercooler.
27
Corrective Action
1. Check all fuses and switches. Check for
loose or faulty wires.
2. Check overload relay in starter. Reset
starter.
3. Reset starter. If starter trips
repeatedly, have electrical system
inspected by an electrician.
4. Repair or replace pressure switch.
Warning – Relieve tank pressure
before servicing.
5. Check with voltmeter. Be sure voltage
corresponds to unit specifications.
1. Adjust or replace.
Warning – Relieve tank pressure
before servicing.
2. Clean or replace
Warning – Relieve tank pressure
before servicing.
3. Be sure that fuses and coils are
properly rated.
4. Check with voltmeter. Be sure voltage
corresponds to unit specifications.
5. Replace motor.
6. Tighten fittings.
7. Clean or replace.
8. Install new valves.
1. Drain tank.
1. Adjust to correct setting.
2. Replace valve.
Warning – Relieve tank pressure
before servicing.
1. Adjust to correct setting.
2. Replace pilot valve.
3. Open ball valve to pilot valve.
1. Realign motor pulley.
2. Adjust belt tension.
1. Check for correct rotation.
(Counter clockwise when viewed from
drive side.)
2. Install new valve plate assembly.
3. Clean or replace.
4. Clean cylinder fins and/or intercooler.
CQF3473 v.01
April 17, 2018