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Quantum Series Installation and Service Manual
720901120 - 12 -
No cooling (con’t) Defective start relay located
on upper rear shelf
inside dispenser
There should be line voltage on the
black wire of the relay when
there is line voltage present on
the orange OR yellow wire.
Replace relay if it fails this test.
Compressor starts but
hums and trips overload
Seized or shorted compressor,
replace.
Compressor starts but does
not switch off of start
winding
Relay or compressor is defective.
Test and replace faulty item.
Compressor short cycles on
overload
Excessively high discharge pres-
sure due to restricted con-
denser or inoperative
condenser fan motor
Refrigerant leak Repair leak. Evacuate and
recharge system.
No water dispensed,
concentrate only.
No water to dispenser Restore water
Water supply line inside
refrigerated cabinet dis-
connected from pump
platform
Reconnect
Water solenoid located on
pump platform clogged
or defective
Disassemble and clean solenoid.
Replace if necessary.
Main water solenoid/
strainer located at base
of dispenser is clogged,
binding or defective
Remove and clean strainer. Con-
firm 28VDC is present at sole-
noid during dispense. Confirm
solenoid coil is not open. Disas-
semble and clean solenoid.
Water supply pressure is
greater than 80 psi (5.5
bar)
Add external regulator and lower
pressure to 50 psi (3.5 bar)