Error Codes
B-14 Service Manual
184
Category: UI
Alarm Priority: Low
Description: RTC NVRAM contained an illegal setpoint temperature.
Resolution: Replace the clock battery. See page 10-29.
If this does not resolve the issue, replace the UI PCBA. See page 10-12.
186
Category: UI
Alarm Priority: Low
Description: Error communicating with AD microprocessor across SPI bus.
Resolution: Replace the ribbon cable. See page 10-19.
202
Category: UI
Alarm Priority: Low
Description: UI microprocessor is receiving too many interrupts from the AD microprocessor.
Resolution: This error may appear due to electromagnetic interference from other devices at
the customer site. Advise the customer to try increasing the distance between
devices, repositioning the cabling, or plugging the devices into separate outlet
circuit branches. See Electromagnetic Compatibility (EMC) on page 13-4 for addi-
tional guidance.
204
Category: UI
Alarm Priority: Low
Description: Spurious interrupt from AD microprocessor.
Resolution: This error may appear due to electromagnetic interference from other devices at
the customer site. Advise the customer to try increasing the distance between
devices, repositioning the cabling, or plugging the devices into separate outlet
circuit branches. See Electromagnetic Compatibility (EMC) on page 13-4 for addi-
tional guidance.
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