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Section 3
Alarms
Error (cont.) Notes
Name: Display Firmware Integrity Failure
Description: The display firmware has failed to pass its CRC CCITT checksum integrity test.
Er05
Response: The display performs this check at startup and the display board will fail to startup without any error indication if it
does not pass this at power on.
Name: Micro Firmware Integrity Failure
Description: The micro firmware has failed to pass its CRC CCITT checksum integrity test.
Er06
Response: This is checked at power on reset and the "Er06" will be displayed for ~10 seconds at startup if this condition
exists.
Name: Micro Fail - CS5521 SPI Failure / UISR Failure
Description: This condition indicates a micro board failure due to either the SPI bus is unable to communicate with the ADC
device or a UISR event caused the microcontroller to be in an unstable state.
Response: The unit will try to recover from this fault three times by a hardware reset of the micro board. In the event that the
system couldn't rectify the issue, the following sequence of events will occur:
Er07
1.
Remote alarm contacts will become active.
2.
Buzzer will annunciate audibly and will have a ringback of 15 minutes.
3.
"Seven segment" display will show "Er07".
4.
The system will have 10 minute staging between the high stage compressor and the low stage compressor activation.
5.
The system will go to bottom out temperatures.
Name: Stuck Button
Er09
Description: This condition indicates that the display board has a stuck button.
Response: The Er09 will show on the display periodically.
Name: Condenser Probe Sensor Failure
Description: This condition indicates that the condenser probe sensor has failed to produce a valid reading for >12 consecutive
Er11
reads (~60 seconds).
Response: The display shows "Er11".
dErr
This is a general display error in which value being displayed can not be represented within characters provided.
Name: Lost Communication
(Four dashes)
Description: Communication between the micro board and the display board has been lost. Under this condition, the visual
---- in display
alarm flashes along with dashes in the temperature display (----). Contact Technical Services.
3-4
Revco ExF
Thermo Scientific
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