Error Codes - GMCW GRINDMASTER RC400 Manual De Mantenimiento

24

Error Codes

QR code SOURCE PROBLEM
1 Tank Heat timeout
2 No / low water flow
3 Tank Over‐ Temperature
4 Open thermistor
5 General fault
ENGLISH
Engineering Department
Erros codes for Mother Parker's Single Cup Brewer
TO BE PERFORMED BY QUALIFIED SERVICE TECHNICIAN
PROBABLE CAUSE
Heater failure
Harness opens
Triac board failure
Limit switch open
Control board failure
Pump failure
Harness opens
Control board failure
Scale build up in tank assembly
Triac board failure
Use of hot water in reservoir
Hot water bypassing into reservoir
while brewing
Brewer will not operate at all
Various
CORRECTIVE ACTION
Measure resistance across heater
leads. If open, replace tank assem‐
bly.
Check conductivity between heater
leads and board. Replace if
needed.
Replace triac board
Replace tank assembly
Replace control board
Apply 24VAC to pump to check
operation. Replace if needed.
Check conductivity between pump
leads and board. Replace if
needed.
Replace control board
Delime tank or replace tank if
needed.
Replace triac board
Check user interaction
Check high pressure bypass check
valve. Pull tube off of top of tank
and blow air towards reservoir. If
air comes out, replace. Pressure is
11PSI nominal.
Check thermistor harness connec‐
tion. Measure thermistor resis‐
tance 30K @ 75F. Replace tank
assembly if needed.
Check latest service materials on
website
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