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6.0 Fault finding
Any/all service work must be earned out by a KD NAVIEN trained Engineer.
Electrical capacitors can remain charged for long periods after disconnection from the
mains supply. Extreme caution must be exercised at all times when working on this product
6.1 General
Before looking for a fault condition, check that:
Mains electrical supply is turned on.
ㆍ ㆍ ㆍ ㆍ
The product programmer with integral room thermostat Is calling for heat.
ㆍ ㆍ ㆍ ㆍ
The gas service cock Is open.
ㆍ ㆍ ㆍ ㆍ
If the cover has to be removed, ensure that the engine head temperature is
below 150 °C, see note under section 6.0
On completion of any service or fault finding operation involving making or breaking electrical
connections always check for EARTH CONTINUITY, POLARITY and RESISTANCE TO EARTH.
The product control unit includes a communications port via which the KD NAVIEN
service engineer can communicate with the product. Functions include fault diagnostics
and parameter management
6.2 Error Display
When a fault
is pending, an error message can be displayed on the info level by pressing
the Info button. The display describes the cause of the fault or warning.
6.2.1 Error Code Subsystem
Line no.
Operating line
6707
Error Code Subsystem
Line no.
Operating line
Navien stirling engine m-CHP installation manual
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