9
TROUBLESHOOTING (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
(A) Test inlet solenoid valve, see “TEST REFIL ?”
under “DIAGNOSTIC ?” menu
(B) Check that unit is connected to water supply,
and water supply is turned on.
See “water is not hot” in PROBLEM section
above.
(A) Empty overflow cup of water
(B) Check for lime on level probe
(C) Test inlet solenoid valve, see “TEST REFIL ?”
under “DIAGNOSTIC ?” menu
(D) Check float switch for continuity
(A) Check that tank temp sensor is connected to
main wiring harness.
(B) Test tank temp sensor, see “CAL tank temp”
under “CALIBRATION ?” menu
(C) Verify wiring
(A) Disconnect tank temperature from main wire
harness, check for zero resistance across leads.
(B) Test tank temp sensor, see “CAL tank temp”
under “CALIBRATION ?” menu
(C) Verify wiring
Test auger motor circuit, see “TEST DISPENSE
HEAD ?” under “DIAGNOSTICS ?” menu
(A) Check wiring between main control board
and display
(B) Replace display board
(A) fill hopper with correct product
(B) Calibrate hopper level sensor, see “CAL HOP-
PER 1 ?” under “CALIBRATION ?” menu
Test dispense switch circuit, see “TEST SWITCH-
ES ?” under “DIAGNOSTICS ?” menu.
Refer to Operations – Rinse Timer
Enter “SETUP” mode to clear fault after problem
has been corrected.
Occurs when refill runs without dispens-
es and without satisfying tank probe for
more than 10 minutes
Occurs when heater runs for more than
120 minutes, refill does not come on , and
tank is still below target temperature.
Occurs when overflow cup is full of wa-
ter
Occurs when tank sensor is disconnected
or resistance to high
Occurs when tank temperature sensor
wires are shorted together, or resistance
is to low.
Occurs when auger motor should be run-
ning, but no pulses are detected from the
RPM sensor
Occurs if display communication lost
Not applicable on (S+)
Occurs when low powder sensor returns
a value lower than threshold
Not applicable on (S+)
Occurs when hot water is dispensed for
more than 2 minutes
Occurs when a rinse has not been per-
formed within the specified time period
and the rinse alarm is enabled.
All fault messages show this for the last
of 3 alternating screens.
LCD screen displays:
“FILL TIME TOO LONG”,
“CHECK WATER SUPPLY”
LCD screen displays;
“HEATING TIME”
“TOO LONG”
“CHECK HEATING” “CIRCUIT”
LCD screen displays: “OVERFLOW
CUP”
“FULL, EMPTY CUP”
“CHECK REFILL”
“CIRCUIT”
LCD screen displays:
“TANK TEMP SENSOR”
“OUT OF RANGE”,
“CHECK FOR BAD” “CONNECTIONS”
LCD screen displays:
“TANK TEMP SENSOR”
“OUT OF RANGE”,
“CHECK WIRE FOR” “SHORTS”
LCD screen displays:
“AUGER 1 FAULT!”
“CHECK MOTOR WIRING”,
“CHK RPM SENSOR”
“CHK MOTOR WIRING”
LCD screen displays:
“DISPLAY BOARD”
“COMM FAULT!”
“CHECK DISPLAY”
“ WIRING CONNECTS”
LCD screen displays:
“HOPPER 1 EMPTY?”
“MUST FILL HOPPER”
LCD screen displays:
“DISPNSE TO LONG”
“CHECK SWITCHES”,
“CHECK WIRE FOR”
“SHORTS”
LCD screen displays:
“RINSE REQUIRED!”
PLEASE RINSE NOW”
“TO OPERATE”
LCD screen displays:
“ENTER SETUP MODE”
“TO CLEAR FAULT”
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Summary of Contents for IMIX
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