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7.3.3 Hi/Low gas pressure switch error

High/Low Gas Press Error

Issue Diagnosis Fix

Error – High/Low Gas Press Inlet gas pressure has risen

above 15" w.c. or has fallen below

3.5" w.c.

Measure the inlet gas pressure.

Reset the switch.

7.3.4 Hi Limit cut-off temperature error

Hi Limit cutoff temperature Error

Issue Diagnosis Fix

Error – Water High-Limit

Exceeded

Water temperature exceeds hi-limit. Boiler is in hard

lockout mode.

See Water

Temperature

function:

reset and

test on page

84.

7.3.5 Low Water Cut-off error

Low Water Cutoff Error

Issue Diagnosis Fix

Error - Low Water Cutoff The Safety and Ignition module

has detected a low water

condition.

See Low water cutoff function:

reset and test à la page 83.

7.3.3 Hi/Low gas pressure switch error

IBC EX 850 Installation And Operating Manual

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