48
13 - TROUBLE SHOOTING
_ _ _ _ _
Lockout Alarm A 0 0
Blocking too long error
Enter Installer Menu, Boiler
Status. Scroll to most recent
Lockout Alarm or Blocking Error.
Diagnose corrective action using
appropriate Troubleshooting Tree.
Unplug connector on supply
sensor. Measure continuity of high
limit sensor (close/open signal)
between two pins connected to
two purple wires. Is continuity
available?
NO
YES
Is wire harness
connected to both
Gas Valve and J13
connector on Control
Module?
NO
YES
Disconnect J13 connector
on Control Module. Measure
resistance across third (blue
wire) and fourth (brown wire)
terminals. Is resistance
between 1.0 and 1.2 kΩ?
NO
YES
Disconnect harness from
Gas Valve. Does each
wire have continuity
between Gas Valve and
Control Module
NO
YES
Is supply pipe (copper
pipe at top of boiler)
hot?
NO
YES
Boiler has been dry
red. System has too
much air. Close manual
gas valve (shut off gas).
Purge air from system,
wait for system to cool.
Replace Supply Sensor
Connect harness
Replace Control
Module
Replace Gas Valve Replace Harness
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