Troubleshooting; On-Board Diagnostics; 4-20Ma Troubleshooting; T" Error Codes - Macurco RD-6 Manuel D'instructions

Macurco RD-xx User Manual

5 Troubleshooting

5.1 On-Board Diagnostics

The RD-xx monitors all critical functions of the unit through software diagnostics that continuously test and verify unit
operations. If a problem is found, the unit will switch to a fail-safe/error mode or trouble condition. In this error mode, the
Alarm relay will be activated, the 4-20 mA current loop will go to 24 mA, the unit will display the error code, the green status
indicator LED light will flash, and the buzzer will chirp intermittently. The Fan relay will also engage if the Trouble Fan Setting
Option is set to "On". This is a safety precaution. To clear this mode, simply turn off power to the unit for a few seconds or push
the ENTER/TEST switch (inside the unit). This will cause the unit to restart the 1-minute self-test cycle.

5.1.1 4-20mA troubleshooting

The 4-20 mA signal can be used for troubleshooting:
• 0 mA is most likely a connection problem
1 mA indicates Calibration Overdue (if 4-20mA is configured to 'EnH')
•
• 4-20 mA is normal gas reading range (0-1,000 ppm)
• 24 mA indicates a Trouble condition

5.1.2 "t" Error Codes

Error Codes
tXX
t01
t02
t04
t08
t10
t20
t40
t80
t100
t200
t8000
Note:
i. For trouble codes over 080 the display will alternate between t_1 and t00 for t100 and between t_2 and t00 for t200.
ii. T8000 has highest priority among all trouble code i.e. if T8000 error code exist along with other 't' error code then 4-20mA
is 1mA if T8000 exist.
iii. T8000 is resolved only with successful field calibration.
If the error mode repeats frequently, check for continuous power and proper voltage. If power is not the problem and a unit has
repeating error conditions, it may need to be returned to Macurco for service, per these User Instructions.
REV – 1.0
Sensor Fatal Error/ Sensor missing
Temperature compensation failure
EEPROM bad checksum
Sensor is shorted
Bad EEPROM
Bad calibration
Factory calibration failure
Read ADC failure
Under range
Sensor expired / End of Life
Calibration Overdue
[34-2900-0511-7 ]
23 |
P a g e