HL 90
6 Functional Checkouts
601
6 Functional Checkouts
6.1 General
This section describes the tests and adjustments on
the heater in installed and removed condition to prove its
serviceability.
WARNING
The heater must not be operated in closed areas like
garages or workshops not provided with exhaust
ventilation facilities.
6.2 Adjustments
6.2.1 Adjustment of CO
2
Contents
The HL90 heater does not require a CO
2
adjustment.
6.3 Components Testing
CAUTION
For individual components checks the electrical
connections on the control unit must be disconnected.
6.3.1 Temperature Limiter Resistance Check
With the reset pin pressed check temperature limiter for
electrical continuity.
6.3.2 Flame Sensor Resistance Check
The check is to be performed with an ohmmeter.
NOTE
The resistance is to be checked alternately on the
connector (reversed polarity).
No light for flame sensor (photo transistor)
• resistance 5 kΩ
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