Watlow MINICHEF 2000 - Manual (Page 58)

D e f i n i t i o n s o f E r r o r s
H a r d w a r e & S o f t w a r e S e t u p G u i d e Wa t l o w M I N I C H E F 2 0 0 0 ■ 5 7
Over range error [Err`8] (channel 1), [Err12] (channel 2)
The over range error occurs when the control is unable to accurately calculate the tem-
perature even though the A/D is able to measure the signal. This is caused by measur-
ing temperature above the temperature range of the control
Ambient out of range error [Err13]
An ambient out of range error occurs when the ambient sensor produces a signal that is
either above or below the range of temperatures that can be calculated for ambient.
This range of temperatures is larger than the operational range of the control its self.
Real-time Clock error [Err14]
A Real-time Clock error occurs when timekeeping components fail. This error message
will appear in the display only at power up. When this error occurs, the controller dis-
ables the Real-time Clock functions and the Power Loss Menu Resume function. The
part number in Wathelp diagnostics will change from
F2HA - _ _ _ _ - 1 _ _ _ to F2HA - _ _
_ _ - 0 _ _ _ .
Order of Priority
The order of priority is as follows starting with the highest:
EPROM checksum error
EEPROM checksum error
RAM error
Calibration error
Channel 1 A/D underflow error
Channel 1 A/D overflow error
Channel 1 under range error
Channel 1 over range error
Channel 2 A/D underflow error
Channel 2 A/D overflow error
Channel 2 under range error
Channel 2 over range error
Ambient out of range
Real-time clock error
Note: See the Troubleshooting Chart in this Appendix for probable causes and possible solutions to alarm situations.