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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 misconfiguration.
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 flue temperature sensor circuit.
E46
Flue Sensor Open
An open circuit has been detected in the boiler flue 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 difference between the boiler supply and return temperatures.
E89
Incorrect Setting
A parameter setting is in conflict with another setting.
E90
Firmware Mismatch
Control module and display firmware 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 configuration 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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