E33, E34, E35, E36, E37, E38, E39, E40, E41, E42
Indicates internal piston is not moving freely.
Possible reasons:-
• Contamination of valve inlet/outlet with debris from supply pipe or other.
• Mechanical damage of valve.
NOTE: After cleaning and before resetting error codes, ensure fire has been allowed to fully cool. Upon
starting the valve will reinitialize and perform a re-calibration. The valve MUST be cold to perform this task.
NOTE: If the valve needs to be replaced, ensure to check pipework for contamination prior to fitting new
valve to help avoid repeated problems.
Indicates that the control has detected a short circuit of the thermocouple.
Possible reasons:-
• Thermocouple connection reversed/incorrect.
• Insulated thermocouple wire shorting to chassis earth (damaged insulation).
• Damaged, defective, or worn out thermocouple.
• Weak connection from thermocouple to valve.
Indicates valve has detected a false flame signal on electrode.
Possible reasons:-
• Contamination of the electrode with carbon deposits, conductive liquids (leak detection spray), or
similar.
• Contamination of thermocouple/valve connection with conductive liquids (leak detection spray), or
similar.
NOTE: It is critical to avoid leak detection fluid making contact with any part of the valve other than the
threaded pipe connections. Leak detection fluids are highly corrosive and will damage any electronics with
which they make contact. Other forms of leak detection should be used where possible.
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