Error Codes; Chapter 4 Maintenance - Thermo Scientific Merlin M75 Manual

Error Codes

Thermo Scientific
Maintenance
Chapter 4
This chapter covers the chiller's basic maintenance.
ROM checksum. Clear with
Test failure. Locks up the program.
Display board failure. Clears when display board is fixed.
Critical checksum failure. Clear with
Synchronous comm - check connections.
Asynchronous comm
Bad calibration data - redo calibration
Unusual Hardware Conditions
These errors will flash on the display and cannot be cleared. These are
internal controller problems.
through
BOM invalid
Functional/ Machine errors
These errors will clear themselves once the problem disappears.
Display Indication
Low temp setpoint warning/fault
Low level warning, fluid below minimum fill level, see Chapter 2
High temp setpoint warning/fault
Shorted internal temperature sensor (rdt1)
Open internal temperature sensor (rtd1)
key.
- Interrupt errors during runtime.
key.
Merlin 4 - 1