Tech West ACL4D2 - Triple Compressor Wiring Diagram

21
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
voltage 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
Dual 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.