Official technical documentation and workshop diagnostics for PT722.
Master Troubleshooting & Diagnostics Matrix
Error Code / Indicator
Symptom / Meaning
Step-by-Step DIY Fix
Suggested Actions
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Tank 1 level not displayed
Possible Cause: Tank 1's probe (CBE mod. SPE/...) is not connected.
Check that the tank probe is connected using the supplied cable. If tank 2 is connected but tank 1 is not, only tank 2's data will display; if neither is connected, the symbol "---" is shown.
