E93.1001EN.C Manual CD
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105
FAULT CODES, BLOCKING CODES
IMPORTANT:
To avoid electric shocks, disconnect electrical supply before performing troubleshooting.
To avoid burns, allow the unit to cool before performing troubleshooting.
Be aware that a fault code is an indication that the unit or the system needs attention.
When repeatedly having faults these should not be neglected.
The first step is to check if the unit is installed according to the instructions. If not, first
make sure the installation complies with the installation manual.
Always check the fuses on the control board before replacing any major components. A
blown fuse can prevent the controller or other components from operating.
Most faults can also be caused by a bad wiring and/or connections, even if it is not spe-
cifically mentioned. With every fault it is wise to check wiring and connections (at both
ends) that connect to the safety device/component that generates the fault.
16.1
Lock-out codes
Having a lockout means that the water heater needs a manual reset to start operating
again.
When the water heater is in lockout the backlight of the display is blinking on and off.
Explanation >
9 9 9 , 5 : h r s
= time elapsed after fault mes-
sage.
Explanation >
P u m p 1
o n
= status of the pump during fault.
Display message
F15
C l
i x o n
F a u l t
p u m p
o n
9 9 9 , 5
h r s
Reason
Heat exchanger fuse or burner door clixon exceeded maximum al-
lowed value.
Cause:
The thermal fuse of the heat exchanger has opened permanently.
Corrective action:
Switch off the electrical power and gas supply and contact supplier.
Cause:
The burner door clixon has opened.
Corrective action:
Remove the burner door of the heat exchanger and check the burner door gasket for
leakage.
Check the burner door for deformation; when it deforms it must be replaced.
Check the heat exchanger for dirt and check that the flue is not blocked.
If heat exchanger is clean, reset manually the clixon itself and reset the water heater.
