Vaisala HMP240 - Manual (Page 114)

HMP240
Appendix 6: HMP243 wiring diagram
M210300en
112
E21 PRB EEPROM ackn. error
- no connection to the EEPROM including calibration information can be
formed. Send the transmitter to Vaisala for repair.
E22 PRB EEPROM checksum error
ackn. error = EEPROM is faulty
checksum error = check sum is erroneous
- possibly due to an electrical disturbance an erroneous calibration parameter
value or an incorrect checksum has been stored in the EEPROM including the
calibration information. Change any parameter value, e.g. RH offset: check the
value with command L, write it down and then change it with command LI.
Return the previous value with command LI and give command RESET, or
turn the power off and then on again. If the error message no longer appears,
check the transmitter reading and if it seems to be in order, the transmitter can
be taken into use again. Should the message re-appear repeatedly, send the
transmitter to Vaisala for repair.
The LEDs display these error types as follows:
¡l¡¡
CPU EEPROM error
l¡¡¡
input hybrid error
1.2 Errors during operation
Two types of errors are possible during operation of the transmitters. The first
type indicates that no frequency comes from the converter.
Display: Serial bus:
E40 f (all) out of range
- the measurement hybrid is probably damaged. Send the transmitter to
Vaisala for repair.