Rinnai E- Series Troubleshooting Manual page 11

T1 Sensor
A temperature difference has been detected
A temperature difference has been detected
between the supply T1 sensor and the return T2
between the supply and return sensor while
sensor while the burner is not in operation. After
the burner is not in operation. After the
the average ΔT has disappeared, the blocking
average ΔT has disappeared, the block will
code will go away.
disappear.
Check the supply T1 sensor and the return T2 sensor for
the proper resistance valve. Replace if found to be
defective. WARNING: Turn off power and water supply
to boiler before removing the T1 or T2 sensor.
11
T2 Sensor
008082013GW