Status Code Displayed
Possible Causes / Description
S0
1. Water section not operating.
Symptom:- Boiler will not
- Poor mains inlet water flow/pressure, check
operate for hot water
availability of adequate mains water supply to
production.
appliance (see Section 2.1: Technical data).
- check/clean water section inlet filter.
- if all above checks are satisfactory, replace
water section.
2. DHW microswitch not switching.
- check/replace DHW microswitch.
S14
1. Maximum Hot Water Temperature set too low.
Note: Under normal and
- adjust Maximum Hot Water Temperature control.
correct operation, status
2. Appliance gas supply partially blocked or under-
code S14 will be
sized.
displayed until the hot
- check gas rate at gas meter, check gas supply
water tap is closed.
pipework.
The faults shown here
3. Diverter valve not switching to DHW position.
should only be suspec-
(Flow pipe to radiators getting hot).
ted if the hot water
- enter diagnostic mode, select 'd.35' and press
is not being heated
the right button.
correctly (see Section
-
if d35
=
1
check connections to diverter valve sole-
2.1 for hot water
noid. If ok. replace diverter valve (see Section 7.17).
performance
-
if d35
=
0
replace CPU circuit board
specification).
(see Section 7.22.4).
64
8.4.4 Fault Diagnosis using the
boiler Status Mode:
Hot Water Operation
Note:
Set central heating control to
"Hot Water only" position and open a
hot water tap.
