General installation and maintenance instructions
SCROLL ENCLOSURE AIR COMPRESSOR
Manual n° 5.18396. VERSION 0 – GB
09/2007
Page 12 / 22
SECTION 9.
TROUBLESHOOTING GUIDES
Items marked with
▲
are not recommended to be fixed by the consumer. Please contact your distributor.
Symptom
Possible Cause(s)
Corrective Action
No display on
1. Electric source is not turned on
1. Turn on electric source
operating panel
2. Fuse on the circuit board was blown off
2. Replace
3. Electric source is not correctly connected
3. Connect it correctly
4. Failure of circuit board
4. Inspect, repair or replace
▲
It does not
1. Failure or wiring failure of magnetic starter
1. Inspect, repair or replace
▲
operate despite
2. Circuit board failure
2. Inspect, repair or replace
▲
display
3. Motor failure
3. Inspect, repair or replace
▲
4. Low voltage
4.
5.
Inspect, repair or replace
▲
Check electric source capacity, size of electric
source cable
T.max 1,2,3 or 4
1. High ambient temperature, bad ventilation
1. Improve installation environment and ventilation
are displayed
2. Clogging of after cooler fins or intake wire
screen
2. Clean
3. Failure of exhaust fan
3. Replace
4. Damage to intake hose
4. Replace
5. Cooling passage of air end clogs
5. Inspect
6. High exhaust pressure
6. Inspect
Disjunction 1,2,3
or 4 are displayed
1. Low voltage
1. Check electric source capacity, size of electric
source cable and change to proper one.
2. Motor failure
2. Inspect, repair or replace
▲
3. Air-end failure
3. Disassemble, inspect, repair
▲
4. Loosened wiring screw
4. Tighten
5. Pressure increases higher than cut-off pres-
sure
5. Readjust
6. Failure of thermal overload
6. Replace
▲
Pressure does
1. Air leaks from piping
1. Inspect, repair
not increase
2. Air-end rotates backward
2. Change phases
3. Failure of pressure setting
3. Readjust
▲
4. Clogged intake filter
3. Clean or replace
5. Failures of belts
4. Replace
▲
Safety valve
1. Failure of safety valve
1. Replace
▲
bows
2. Failure of pressure setting
2. Readjust
▲
3. Failure of pressure transducer
3. Replace
▲
Abnormal sound 1. Air-end rotates backward
1. Check air-end rotation and change phases
2. Air-end failure
2. Inspect, repair or replace
3. Belt slips
3. Check tension and readjust
4. Motor failure
4. Inspect, repair or replace
5. Exhaust fan blades contacted
5. Inspect and repair
6. Loosened bolts
6. Inspect and tighten
