Error Codes - ALLIANCE T30 Series Troubleshooting Manual

57. Error Codes

OP - Indicates physical "open" in the thermistor circuit. Possible causes are: 1) thermistor, 2) wiring between con-
trol and thermistor, 3) control.
SH - Indicates a "short" in the thermistor circuit. Possible causes are: 1) shorted thermistor, 2) a short in the wiring
between control and thermistor, 3) control.
Card Reader Machines: (In addition to the above errors)
EC:19 - Indicates no card reader communication. The control and the reader cannot communicate. Check reader,
control and harness.
NOTE: For all other card reader errors, consult the card reader manual provided by the manufacturer.
Display
OP
Indicates an open circuit in the thermistor. • Check thermistor. Replace if inoperative.
SH
Indicates a short circuit in the thermistor.
EC:19
Indicates no communication between
control and card reader.
*Card Reader
models only
70291301
Definition
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Micro Display Control Troubleshooting
Corrective Action
• Check wiring between control and
thermistor. Refer to wiring diagram for
proper wiring.
• Check control. Replace if inoperative.
• Check thermistor. Replace if inoperative.
• Check wiring between control and
thermistor. Refer to wiring diagram for
proper wiring.
• Check control. Replace if inoperative.
• Check card reader. Replace if inoperative.
• Check wire harness connecting card reader
and control. Replace if inoperative.
• Check control. Replace if inoperative.
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