Speedaire 4B242A Instructions D'utilisation Et Manuel De Pièces page 7

Speedaire Operating Instructions and Parts Manual
Models 4B242A and 4B243A
TROUBLESHOOTING GUIDE FOR UNITS IN SERVICE FOR A PERIOD OF TIME
Symptom
Motor does not run
Motor hums; motor draws
high amps, trips overload, trips
breaker, or blows fuse on start
up
Compressor runs but builds
pressure slowly
Oil out breather
Possible Cause(s)
1. Loose electrical connections
2. Blown fuse and / or tripped
breaker
3. Starter overload tripped
4. Defective capacitor
1. Defective pressure switch
unloader
2. Defective check valve -
constant loss of tank pressure
3. Loose electrical connections
4. Defective capacitor
5. Valve problem or blown
gasket
1. Air leak
2. Dirty air filter
3. Valve problem or blown
gasket
1. Worn rings or scored cylinder
2. Compressor running hot
Corrective Action
1. The entire electrical system should be checked by
a certified electrician. The incoming wires and the
compressor electrical connections should be checked. Loose
connections will cause malfunctions
2. The breaker and fuses required for this unit must be time
delay.
A tripped breaker or blown fuse may result from a direct
short to ground, high current draw, improper wiring,
incorrect fuse or breaker size and/or type. This needs to be
evaluated by a service center or certified electrician
3. Check and reset if necessary. If the overload trips after
the initial reset, refer to "Troubleshooting Guide for New
Installations."
4. Check and replace (if necessary) defective capacitor
1. Drain the tank of all pressure. Restart compressor under no
load. If compressor is able to start, then the unloader needs
to be checked. If this problem is not corrected it will fail the
motor and / or other electrical components
2. Determine if the check valve is working properly - pressure
switch unloader should quit hissing after the compressor
shuts off. If the hissing continues and if there is a constant
loss of tank pressure, then the check valve is not working
properly. Replace check valve
3. The entire electrical system should be checked by
a certified electrician. The incoming wires and the
compressor electrical connections should be checked. Loose
connections will cause malfunctions
4. Check and replace (if necessary) defective capacitor
5. Check gasket and replace as needed. Other symptoms
occur when a valve is not sealing or a gasket is blown such
as higher than normal amp draw which may trip out the
overload or breaker
1. Check the entire system for leaks, including the compressor
unit and any piping attached to the compressor
2. Air filters need to be changed regularly based on usage
and environment. A dirty filter may appear to be clean.
Change filters often
3. Check gasket and replace as needed. Other symptoms
occur when a valve is not sealing or a gasket is blown such
as higher than normal amp draw which may trip out the
overload or breaker
1. Replace rings and/or replace cylinder
2. Make sure compressor is running the correct rotation.
Compressor should be clean and in a well ventilated area.
Oil should be changed on regular intervals according to the
specifications listed in the manual.
Air filter must be changed as it gets dirty
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4B242A and 4B243A
Continued on next page
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