Maintenance
NOTE
Maintenance may only be carried out by persons
with the necessary expertise.
When replacing components on S1156 only replace-
ment parts from NIBE may be used.
NOTE
If an electrical connection has been disconnected
and is connected, ground must be checked using
a suitable multimeter.
NOTE
An immersion heater without a temperature limiter
is not allowed to be installed.
NOTE
Inspect and clean the water heater by using a
suitable instrument such as an endoscope via the
inspection hatch (QQ1).
NOTE
After servicing, complete the relevant Service In-
terval Record section of the Benchmark Checklist
located at the back of this document.
Completion of the Service Interval Record is a
condition of warranty. For full terms and conditions
of warranty, please see our website nibe.co.uk.
GENERAL INSPECTION
Check the following:
1. Condition of casing.
2. Electrical connections.
3. Pipe connections.
4. Alarm log.
Correct any fault before continuing.
BRINE SYSTEM
Check the following:
1. Particle filter.
2. Anti-freeze with suitable refractometer.
3. Expansion vessel.
4. System pressure.
5. Flow and return temperature. The difference must be
2 - 5 °C
Correct any fault before continuing.
CLIMATE SYSTEM
Check the following:
1. Climate system start and stop temperature.
2. Heating curve settings.
3. Function of the room sensor (if installed).
4. System pressure.
5. Flow and return temperature. The difference must be
5 - 10 °C
Correct any fault before continuing.
Service actions
NOTE
S1156 must be serviced once a year by competent
and qualified personnel, such as a NIBE a service
engineer or other qualified professional.
When replacing components on S1156 only replace-
ment parts from NIBE may be used.
EMERGENCY MODE
NOTE
Do not start the system before filling up with wa-
ter. Components in the system could be damaged.
Emergency mode is used in event of operational interference
and in conjunction with service.
When the emergency mode is active, the status lamp is yel-
low.
You can activate the emergency mode both when S1156 is
running and when it is switched off.
To activate when S1156 is running: press and hold the on/off
button (SF1) for 2 seconds and select "emergency mode"
from the shutdown menu.
To activate emergency mode when S1156 is switched off:
press and hold the on/off button (SF1) for 5 seconds. (De-
activate the emergency mode by pressing once.)
When S1156 is put in emergency mode, the display is
switched off and the most basic functions are active:
• The immersion heater works to maintain the calculated
supply temperature. If there is no outdoor temperature
sensor (BT1), the immersion heater works to maintain the
maximum supply temperature, set in menu 1.30.6 -
"Highest supply heat".
NIBE S1156Chapter 10 | Service62
Service
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