18
Grindmaster
®
Coffee Brewers
Troubleshooting Guide (continued)
Filling / water leakage problems (continued)
PROBLEM
POSSIBLE CAUSE
SERVICE CHECK
SOLUTION
Water tank does not
•
Power is not supplied
•
Check power
•
Ensure the branch circuit
refill
to the machine
connections
is on, the power switch
on the back of the
machine is on, and the
circuit breaker next to
the power switch is not
tripped
•
Water supply is turned
•
Verify water supply is
•
Check water supply to
off to machine
on and active
machine is turned on if
necessary, verify that
water supply is actually
on by removing the
water inlet connection to
verify flow
•
Faulty fill valve
•
Check if fill valve
•
Replace valve if valve is
electrical input is ok
receiving 24vdc input
•
Check electrical
•
Correct electrical
connections at both
connections
fill valve and control
board
Heating problems
PROBLEM
POSSIBLE CAUSE
SERVICE CHECK
SOLUTION
Water tank does not
•
Heater circuit breaker
Reset circuit breaker on
heat but display
has tripped
back of machine by
indicates “heating”
pressing plunger
•
Solid state relay
•
Check Relay
•
Ensure Solid State Relay
connections are faulty
connections
connections are good at
control and relay located
on bottom of tank
(Confirm Polarity is correct)
•
Solid state relay is
•
Check DC input
•
Replace the SSR if the
faulty
voltage input and line
SSR DC input voltage is
voltage output at
3.3 volts and the SSR
SSR. Note that SSR
output voltage is
has a LED indicator
receiving line voltage
which illuminates
when the SSR
receives a signal to
turn the heater on
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.
