FAULT CODES
SECTION 6
35
FAULT
CODES
MASTER BOARD BLOCKING CODES
SLAVE BOARD BLOCKING CODES
SLAVE BOARD LOCKOUT CODES
A fault code will appear in the control panel display if there is a lockout failure. A letter and
the number of the burner module appear alternately in the display. The letter A is for a
lockout fault, and E is for a blocking fault. The two right segments show a fault code, table
2 gives the meanings of the different codes. If there is a fault in more than one burner
module the display alternates every 5 seconds between burner modules and their
associated fault codes.
Lockout faults can be reset using the reset button. Only the burner module for which the
fault code appears in the display at that moment is reset. Any E code (or blocking faults)
will require some form of rectification before it can be reset i.e. repair or replacement of a
component or part. An E code could indicate a fault in connection with the Master or Slave
boards.
E09
Control Error: Internal RAM location not correct
E12
Control Error: The incorrect parameters are
programmed in the slave board
E13
Control Error: A references measurement indicated
that the AD-circuit is defective, too low
E14
Control Error: A references measurement indicated
that the AD-circuit is defective, too high
E15
Control Error: A references measurement indicated
that the AD-circuit is defective, too low
E16
Control Error: A references measurement indicated
that the AD-circuit is defective, too high
E18
Control Error: Internal RAM
E19
Control Error: Not able to read parameters
E20
No slave board present
E22
Power Fault: The 50Hz has too large deviation
E60
Tank sensor opened circuit
E65
Return sensor opened circuit
E70
Tank sensor shorted
E75
Return sensor shorted
E0
Read Error: Not able to read stored parameters
Control Error: Reference measurements indicates
that there is an error in the AD circuit
E33
Flame detected when gas valve was closed
E41
Phase Error: Live and netural reversed
E42
Phase Error: Too much deviation in the supply
voltage frequency
E44
Control Error: Poor communication between the
two processors
E47
Return sensor open circuit
E48
Flow sensor open circuit
E63
Return sensor short circuit
E64
Flow sensor short circuit
E78
Reset Error: Too many user resets
A01
Three Failed Ignitions: After three ignition, there was
still no flame detected
A02
Overheat Stat Failure: No water flow conditions, the
flow sensor is not detecting a temperature increase
during operation
A03
The two flow sensors have too greater temperature
differential between them, 10
º
C for more than 60
seconds
A05
Gas Valve Relay Error: The gas valve relay is not
switch correctly
A06
Safety Relay Error: The safety relay is not switching
correctly
A08
Fan Error: The fan is not reaching its target value or
speed for more than 60 seconds
A09
Control Error: Internal storage location
A10
The contents of the stored parameters are not correct
A11
Flow Temperature: Flow temperature went above
95
º
C
A12
Control Error: The stored contents inside the control
are not matching the software version
A14
Control Error: Internal storage location
A15
Control Error: Internal storage location
A16
Control Error: Internal storage location
A17
Control Error: Internal storage location
A19
Control Error: Internal storage location
A20
Flame detection after gas valve as closed. Flame
still present 10 seconds after the gas valve is closed
A21
Flame detected before opening of the gas valve
during the start up sequence
A24
Too many flame failures: When the flame failures
three times within one burn cycle
Table 2. Fault Codes
E28, E29
E30, E31
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