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American Metal Ware
®
P400GNB-E
Problem
Brew volume
erratic
(NOTE: Small
variations from
batch to batch
are normal.)
Brew Only or
Grind’n Brew cycle
will not start
During Brew Only
or Grind’n Brew,
the brewing cycle
does not brew
Sprayhead will not
stop dripping water
Water boiling in
water tank
Possible Causes
• Water supply pressure fluctuates.
• Fill valve faulty or clogged.
• Water not up to proper brewing
temperature.
• Touchpad defective.
• Brew valve faulty.
• Blown fuse on control board.
• Brew valve does not close completely.
• Temperature in water tank too hot.
Solutions
• Plumb water supply so that water pres-
sure is not significantly affected by other
appliances.
• Check for power at fill valve when unit is
calling for water. If water flow is slow or
valve not operating, repair valve. In
normal operation, the fill valve should
cycle several times throughout the
brewing cycle.
• Wait for water to reach proper brewing
temperature.
• Exchange touchpad with another unit. If
problem is corrected, original unit faulty.
• Check if brew valve is energized with
120 Vac. If valve is energized and not
opened, replace part.
• Check and replace fuse if blown.
• Visually inspect valve. Clean lime from
valve. Seat, cup or entire valve may
need replacement.
• Reduce the water tank temperature.
Adjustment knob is located on the control
board face.
BREWING PROBLEMS
Problem
Hot light flashing
@ slow rate and
ER1 code dis-
played on control
board
(Also unit will not heat
water, perform any
brewing function nor
autofill)
Hot light flashing
@ fast rate and
ER2 code dis-
played on control
board
(Also unit will not heat
water or perform any
brewing function)
Possible Causes
• Fill valve opened for over 5 minutes
(this may occur on initial fill - see
Initial Start-up section
).
• Water service not on.
• Water service not supplying enough
water flow.
• Loose connections in the thermistor
circuit.
• Thermistor failure.
Solutions
• Refer to
Initial Start-up section
to reset
the control board.
• Ensure that water supply is on.
• Water pressure measured at the unit’s
water inlet valve should be between 30
psi to 70 psi delivering a minimum of
1 1/2 gallons per minute.
• Ensure that connector CN7 is securely
attached to controller and that thermistor
is securely connected at disconnect.
• Defective thermistor, replace.
ERROR CODES
Troubleshooting (cont.)
