Rheem Electric Water Heaters Error Codes
Commercial Electric Water Heaters 9kW – 900kW Input Models
There are seven error messages that can be displayed in response to
software or hardware problems with the boiler’s internal
electronic temperature control. The error codes that may be seen
flashing on the display are:SF – Sensor Failure
The display flashing SF indicates an out-of-range or defective sensor. Make sure sensors are properly installed, wired and connected to the control. Correct sensor installation or replace sensor.
EF- EEPROM Failure
The values read form the EEPROM are not the same as the values written into the EEPROM. This error cannot be field repaired. Replace the water heater’s electronic temperature control.
CF – Calibration Failure
The calibration resistor reading was not within the range of the Analog to Digital converter. This error cannot be field repaired. Replace the water heater’s electronic temperature control.
OF – Stray Interrupt Failure
An unused interrupt occurred. This error cannot be field repaired. Replace the water heater’s electronic temperature control.
CE – Configuration Error
The device hardware was configured to a nonexistent device. This error cannot be field repaired. Replace the water heater’s electronic temperature control.
OE – ROM Error
The internal ROM of the microprocessor in the boiler’s electronic temperature control is defective. This error cannot be field repaired. Replace the water heater’s electronic temperature control.
AE – RAM Error
The internal RAM of the microprocessor in the boiler’s electronic temperature
control is defective. This error cannot be field repaired. Replace the
water heater’s electronic temperature control.Commercial Point of Use Electric Water Heater Trouble Shooting Guide
Commercial Point of Use Electric Water Heater Trouble
Shooting Guide
