Rinnai HE Series How To Use Manual page 157

Direct vent tankless water heater, temperature controllers
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Code 05 Troubleshooting Procedure 
Bypass Servo 
 
 
2. Turn off power supply to unit, reapply power. Fire up unit. If code 05 reappears replace bypass 
valve.     
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

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