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CHAPTER 9
CHAPTER 9 - CTRLMAX OPERATION
Code Lockout Message Description
E7 High Flue Temperature Flue temperature exceeds high limit.
E12 Internal Control Fault EEPROM misconguration.
E25 Internal Control Fault CRC check error.
E32 DHW Sensor Shorted A short circuit has been detected in the DHW temperature sensor circuit.
E33 DHW Sensor Open An open circuit has been detected in the DHW temperature sensor circuit.
E34 Low Voltage Line voltage has fallen below an acceptable operating level.
E37 Low Water Water pressure has fallen below 7.2 psi.
E45 Flue Sensor Shorted A short circuit has been detected in the boiler ue temperature sensor circuit.
E46 Flue Sensor Open An open circuit has been detected in the boiler ue temperature sensor circuit.
E76 External Limit Open An external automatic reset boiler limit has opened.
E77 High Mix Circuit Temperature Mix circuit temperature exceeds Mix zone high limit setting.
E78 Mix Circuit Sensor Shorted A short circuit has been detected in the mix circuit temperature sensor circuit.
E79 Mix Circuit Sensor Open An open circuit has been detected in the mix circuit temperature sensor circuit.
E81 Sensor Drift Supply and return temperatures are not equal.
E82 Delta T Protection Excessive dierence between the boiler supply and return temperatures.
E89 Incorrect Setting A parameter setting is in conict with another setting.
E90 Firmware Mismatch Control module and display rmware versions are incompatible.
E91 System Sensor Shorted A short circuit has been detected in the system temperature sensor circuit.
E92 System Sensor Open An open circuit has been detected in the system temperature sensor circuit.
E93 Outdoor Sensor Shorted An open circuit has been detected in the outdoor temperature sensor circuit.
E94 Internal Display Fault Display memory error.
E95 Supply Sensor Error Supply sensor reading is invalid.
E96 Outdoor Sensor Open An open circuit has been detected in the outdoor temperature sensor circuit.
E97 Cascade Mismatch Cascade conguration has changed.
E98 Cascade Bus Error Communication with other boilers has been lost.
E99 Controller Bus Error Communication between boiler display and control module has been lost.
9.14.4 Automatic Reset Blocking Lockouts
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