Instruction manual

56
12 - USE
E14
12.12.2 - Diagnostics: “E” blocking errors (continued)
“E”
Code
Blocking
description
Checks to make
Solutions
U8 return temperature
sensor short-circuited
E15
E16
E17
E18
E19
E20
E21
E22
E23
E30
E31
E32
E33
E42
E50
E51
U4 outside sensor short-
circuited
Erroneous temperature
reading.
U3 cold water
temperature or storage
tank sensor circuit
shorted
U6 boiler temperature
sensor circuit shorted
E2prom memory damaged
Flame presence with gas
valve closed
Phase and neutral
inverted
Electrical supply
frequency other than
60Hz
Ground connection is
absent
Erroneous temperature
reading.
Erroneous temperature
reading.
Erroneous temperature
reading.
Erroneous temperature
reading.
Program error
Error in the boiler TYPE
selection
Reset button pressed too
often in a short period time
Check that the electrical resistance of
the sensor corresponds with the graph
in section 13.14;
check that the electrical connection
cables between the sensor and the
power control board
Check that the electrical resistance of
the sensor corresponds with the graph
in section 13.15;
check that the electrical connection
cables between the sensor and the
power control board
Check that the electrical resistance of
the sensor corresponds with the graph
in section 13.14;
check that the electrical connection
cables between the sensor and the
power control board
Invert phase and neutral
Check the electrical frequency of the
system.
Check if CS parameter is at 02 or 03
Check that the electrical resistance of
the sensor corresponds with the graph
in section 13.14;
check that the electrical connection
cables between the sensor and the
power control board
Check if the boiler is properly grounded
Push ON switches 7 an set again the
correct TYPE.
If the sensor resistance does not correspond, it must be
replaced;
if the electrical circuit is damaged, it must be repaired;
if the previous two cases do not apply, replace the power
control board
If the sensor resistance does not correspond, it must be
replaced;
if the electrical circuit is damaged, it must be repaired;
if the previous two cases do not apply, replace the power
control board
Replace the power control board
If the sensor resistance does not correspond, it must be
replaced;
if the electrical circuit is damaged, it must be repaired;
if the previous two cases do not apply, replace the power
control board
If the sensor resistance does not correspond, it must be
replaced;
if the electrical circuit is damaged, it must be repaired;
if the previous two cases do not apply, replace the power
control board
Replace the command and control board
Replace the gas valve
If phase and neutral are correctly wired, replace the power
and control board
If the electrical supply frequency is other than 60Hz, contact
the electric company;
if the mains frequency is 60Hz, replace the command and
control board.
Make sure that the CS parameter is at 02 or 03.
if the boiler is properly grounded, replace the power control
board
Replace the power control board
Replace the power control board
Replace the power control board
Replace the power control board
Replace the power control board
If TYPE values is correct, change the power control board