Fault Code Lookup

HVAC Sales Master
T901_O
Inverter Fault - Compressor Overcurrent
This code typically points to
  • Compressor current exceeds acceptable level

Next checks to confirm
  1. Verify compressor/inverter current and operating load

Escalation
3-strikes to permanent lockout
Reset behavior
Lockout exit per platform after root cause correction.
Urgent
Fix now
Source
Rheem RP18AZ Installation Instructions Table 15 and overcurrent section