88
17.2
BLOCKING CODES
Blocking codes signify that a situation is present under which the boiler is not safe to operate but once the
situation clears, operation can safely continue. When a blocking of the boiler is active, the display is constantly
illuminated.
When a blocking occurs, the display will show a description of the condition in the top line of the display; the
bottom line of the display will show the time that has elapsed since the blocking occurred.
Display message
S
i
p h o n
s w
i
t c
h
F19
p u m p
o n
9 9 9
,
5
h
r
s
Reason:
Siphon pressure switch detects high pressure in the flue/condensate drain system.
Cause:
Corrective Action:
Check if the flue system is blocked.
Check the flue gas system diameter & length complies with
Section 8.4
or
Section 8.5
.
Cause:
Corrective Action:
Cause:
Corrective Action:
Cause:
Blockage of the signal hose to the pressure switch.
Corrective Action:
Check the signal hose and clean or replace it if necessary.
Cause:
Faulty pressure switch causing an incorrect signal.
Corrective Action:
Replace the pressure switch.
Cause:
Bad wiring/connection in the pressure switch circuit.
Corrective Action:
Check for loose wiring/connections in the pressure switch circuit.
The condensate drain system is blocked causing the condensate to build up above the measuring point of the pressure
Pressure fluctuations in the building drainage system are affecting the heat exchanger.
Make sure that there is an air-break between the condensate drain hose and the drainage system of the building
Check the condition of the heat exchanger and clean if necessary.
Check that the condensate drain hose between the heat exchanger and the water trap is free from blockages, ensuring the
condensate can flow freely to the trap.
Check if the condensate water trap is free of debris that might block the condensate flow and clean if necessary.
Check the condensate drain hose between the water trap and the condensate drain point in the external installation for
blockages. Condensate must be able to flow freely.
There is too much resistance in the flue system causing excessive pressure in the heat exchanger.
Display message
F
l
o w
t
e m p
h
i
g h
9 9 9
,
5
h
r
s
Reason:
Cause:
The water flow is restricted
Corrective Action:
Check the operation of the integral pump.
Check that all valves that may restrict the water flow through the unit are fully open.
Check for an external system pump that influences the flow through the boiler.
Check if the system resistance exceeds the spare capacity of the integral pump.
The flow temperature has exceeded the blocking temperature but not the lock-out
Содержание CP-M Series
Страница 5: ...5 2 0 PRINCIPAL PARTS FIGURE 2 1 REMOVABLE COMPONENTS CP M 60...
Страница 6: ...6 FIGURE 2 2 REMOVABLE COMPONENTS CP M 60 CONTINUED...
Страница 8: ...8 FIGURE 2 3 REMOVABLE COMPONENTS CP M 80 CP M 100...
Страница 9: ...9 FIGURE 2 4 REMOVABLE COMPONENTS CP M 80 CP M 100 CONTINUED...
Страница 11: ...11 FIGURE 2 5 REMOVABLE COMPONENTS CP M 120...
Страница 12: ...12 FIGURE 2 6 REMOVABLE COMPONENTS CP M 120 CONTINUED...
Страница 14: ...14 FIGURE 2 7 REMOVABLE COMPONENTS CP M 150 CP M 180...
Страница 15: ...15 FIGURE 2 8 REMOVABLE COMPONENTS CP M 150 CP M 180 CONTINUED...
Страница 94: ...94...
