13–8–606 Page 47
SYMPTOM
POSSIBLE CAUSE
REMEDY
“MOTOR OVERLOAD”
1.
Running compressor at a
1.
Lower pressure to nameplate.
shutdown.
pressure over nameplate
pressure.
2.
Incoming voltage low or
2.
Consult your power company.
high.
3.
Imbalanced voltage
3.
If imbalance exceeds 5%,
(check phase to phase).
check incoming power.
4.
Imbalanced amps.
4.
Rotate 3 phase power leads.
If the high reading stays on
the same leg, the problem is
with the motor.
If the high reading moves
with the lead, the problem
is with the incoming power.
5.
Incorrect motor overload
5.
Set overload to motor name–
setting.
plate amps.
“CHANGE AIR FILTER” light on.
1.
Dirty air filter.
1.
Clean or replace.
“CHANGE AIR FILTER” light on,
1.
Faulty vacuum switch.
1.
Measure the AC voltage
and WILL NOT RESET.
between wire number 7 and
wire number #6 at board.
If the reading is zero,
replace the vacuum switch.
2.
Control board fault.
2.
Measure the AC voltage
between wire number 7 and
wire number #6 at board.
If the reading is 24 volts,
replace the control board.
“MOTOR OVERLOAD”
1.
Loose connections.
1.
Measure the AC voltage
shutdown.
between wire number 5 and
(RELAY NOT TRIPPED)
wire number #6 at board.
If the reading is zero,
tighten the connections.
2.
Control board fault.
2.
Measure the AC voltage
between wire number 5 and
wire number #6 at board.
If the reading is 24 volts,
replace the control board.
“EO4”, Emergency Stop
1.
Loose connections or
1.
Tighten connection or
will not clear.
faulty switch.
repair or replace switch.
2.
Control board fault.
2.
Measure the AC voltage
between wire number 3 and
wire number #6 at board.
If the reading is 24 volts,
replace the control board.
3.
Contact block not
3.
Ensure contact block is fully
properly installed.
snapped into left or right (not
center) slot of switch operator.
Summary of Contents for EDF-KB
Page 14: ...13 8 606 Page 6 DECALS 206EAQ077 212EAQ077 218EAQ077 211EAQ077 207EAQ077...
Page 15: ...13 8 606 Page 7 DECALS 216EAQ077 217EAQ077 222EAQ077 221EAQ077 208EAQ077...
Page 34: ...13 8 606 Page 26 FIGURE 4 10 WIRING DIAGRAM FULL VOLTAGE DUAL CONTROL 208EDF546 Ref Drawing...
Page 36: ...13 8 606 Page 28 FIGURE 5 1 FLOW DIAGRAM 204EDF797 Ref Drawing...
Page 58: ......
