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8.2.2 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 Resetting a boiler after a

hi-limit temperature lockout on

page 88.

8.2.3 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 Resetting a boiler after a

LWCO lockout on page 88.

8.2.4 Aux. Interlock 1 or 2

Aux. Interlock 1 or 2

Issue Diagnosis Fix

Interlock 1 or 2 terminals are

open.

Jumper lead is loose or

compromised.

Replace the jumper lead.

External safety is in an alarm

state.

Inspect the external safety

devices.

Section: Troubleshooting

IBC VX Series User Manual

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