PB330 & PB430 Shuttle
®
Brewers
American Metal Ware
19
Troubleshooting Guide (continued)
WARNING:
To reduce the risk of electrical shock, unplug the power cord before repairing or replacing
any internal components of the unit. Before any attempt to replace a component, be sure to check all electrical
connections for proper contact. Only a qualified service technician should perform electrical and mechanical
adjustments or repairs.
Heating Problems (continued)
PROBLEM
POSSIBLE CAUSE
SERVICE CHECK
SOLUTION
Tank does not
•
Heater relay faulty.
•
Ensure that coil on
•
If the relay coil is energized
heat.
heater relay is
and there is an open circuit
energized by ensuring
across the connection tabs,
that there is 24 VDC
replace relay.
between the gray and
blue wires attached to
the relay. Remove the
black and brown
wires from the relay
and check for an open
circuit across the
connection tabs (COM
and NO) to which the
wires were attached.
•
Thermal cut-out
•
Check for open circuit
•
Replace thermal
tripped or faulty.
on thermal cut-out.
cut-out.
(NOTE: Tripping of
thermal cut-out can
indicate presence of
another problem
with the unit. Unit
should be
monitored.)
•
Contactor faulty.
•
Ensure that coil on
•
If the contactor coil is
contactor is energized
energized and there is an
by ensuring that there
open circuit across any of
is proper voltage
the contactor poles, replace
between the brown
contactor.
and white wires
attached to the relay.
Check each side of the
contactor (Line and
Load) at each pole for
continuity.
•
Heater faulty.
•
Check resistance
•
If resistance is much less
across element(s)
than 8 Ohms or much more
with power conductors
than 15 Ohms, replace
disconnected.
heater(s).
