Troubleshooting; On-Board Diagnostics; 4-20Ma Troubleshooting; T" Error Codes - Macurco GD-6 Operation Manual

Macurco GD-xx Operation Manual

5 Troubleshooting

5.1 On-Board Diagnostics

The GD-6 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 TEST switch (inside the unit). This will cause the unit to restart
the 1-minute self-test cycle.

5.1.1 4-20mA troubleshooting

• 0 mA is most likely a connection problem
• 4-20 mA is normal gas reading range (0-50% LEL)
• 24 mA indicates a Trouble condition

5.1.2 "t" Error Codes

tXX
t01 Sensor Fatal Error
t02 Sensor Offset Regulation Error
t04 Sensor Algorithm Error
t08 Sensor Output Error
t10 Sensor Self Diagnostic Error
t20 Sensor Out of Range Error
t40 Sensor Memory Error
REV – 2.0.0 [34-2900-0027-6 ] 25 | P a g e