Airmac Owner’s Manual
August 2006
© Glenco Manufacturing Pty Ltd
Page 33 of 44
TABLE 5
TROUBLESHOOTING CHART
Symptom
Possible Cause
Corrective Action
Motor will not start, runs
slowly or repeatedly trips out
overload protection.
1. Pressure switch not
turned on.
2. Air receiver tank pressure
above cut-in pressure.
3. No voltage at the
pressure switch.
4. No voltage at the electric
motor (faulty pressure
switch, dual DOL starter
or star-delta starter).
5. No voltage on one or two
phases of 415 V supply.
6. Low supply voltage.
7. Use of extension lead.
8. 240 V: Thermal overload
switch on motor tripped.
9. 415 V: Thermal overload
relay in pressure switch
tripped.
10. 415 V: Thermal overload
relay in star-delta starter
tripped.
11. Faulty pressure switch
unloader valve (nil or
restricted unloading air
flow).
12. Nil or restricted discharge
air flow through non-
return valve.
1. Turn on pressure switch.
2. Nil (no fault).
3. Check electricity supply
including all fuses, circuit
breakers, switches and
wiring.
4. Repair or replace
pressure switch, dual
DOL starter or star-delta
starter.
5. Check voltage on all three
phases of 415 V supply.
6. Check no load and full
load supply voltage.
Upgrade power supply
circuit if required.
Disconnect any other
appliances on the same
supply circuit.
7. Do not use extension
lead. Use longer air hose
with larger diameter.
8. 240 V: Allow motor to
cool down and manually
reset overload switch.
9. 415 V: Allow motor to
cool down and manually
reset pressure switch to
the “AUTO” position.
10. 415 V: Allow motor to
cool down and manually
reset overload relay
(located inside the star-
delta enclosure).
11. Replace unloader valve or
complete pressure switch.
12. Repair or replace non-
return valve.
