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TM061 Rheem 27 Water Star Service Instructions
– Issued: 11/10
REV A Issued 08/13
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Service. Al
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Error Code 99
Fan Motor is not creating enough ventilation. The fluing system passed pre-purge, but has
failed during normal operation. At a minimum check the following:
1 Check for blockage of heat exchanger fins.
2 Clean air intake filter.
Warning Code IL
Unit may have scale build-up inside heat exchanger. Drain and flush the exchanger.
Warning Code P1
Water flow rate is less than minimum for main burner ignition. The unit must have 2.5 litres
per minute before the main burner will light or sustain burner. When water flow does not
reach minimum flow rate for five seconds the warning code is displayed. At a minimum
check the following:
1 Check cold water inlet strainer for debris.
2 Check fixture aerator strainer for debris.
Warning Code 10
This is a warning code. Fan Motor is not creating enough ventilation. The venting system
passed pre-purge, but has failed during normal operation. At a minimum check the following:
1 Check for blockage of heat exchanger fins.
This warning code is followed by failure Error Code 99.