Tech West ACL4D2 - Dual Compressor Wiring Diagram

19
CHECK FOR:
1. Broken or loose
wire.
2. Defective pressure
switch.
3. Defective ON/OFF
switch.
4. Excessive voltage
drop across power
lines.
Is there sufficient volt-
age at motor terminals
when motor tries to
start?
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COMPRESSOR
DOES NOT RUN
OR RUNS FOR
ONLY A FEW
SECONDS.
YES
Is room
temperature
above 40
o
fahr.?
YES
Does head
run with dis-
charge line
disconnected?
Increase
room temp.
NO
Blockage in
air line.
Locate &
repair.
YES
YES
NO
YES
Does motor run
after tapping
capacitor/relay box
or does start
capacitor feel hot?
NO
YES
Is there continuity
across terminal 2 & 5
or potential relay?
NOTE:
1. Tape relay box.
If starts, relay is bad.
2. Check for continuity
across 2 & 5.
Replace if none.
Wiring Diagram
Single Ultra Clean Lubricated Compressor
NO
Is there
sufficient
voltage at
disconnect
box?
NO
Install
Tech West
transformer.
NOTE: Voltage
should be + or -
10% of rating.
Is there resistance
rise across the
capacitors?
Is there continuity
across the thermal
protector?
Contact Tech West.
Head may be frozen.
YES
YES
Replace
defective
potential
relay
YES
NO
Replace
defective
capacitors.
NO
Replace
defective
thermal
protector.
NOTE:
Short capacitor leads.
Check resistance
rise. If no resistance
rise, replace.