Check 2HTCON2 Relay Coil

Failure in the 2HTCON2 relay coil (Compartment 2 Heat 2).

Possible causes

Electrical failure in the relay
Loose terminals due to vibration
Weak micro-inverter control signal

Recommended actions

Swap relay with 2HTCON1 for troubleshooting
Check pins on controller connector
Restart system and observe activation under demand

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