Dettson Chinook C105-M-V, Инструкции по установке и руководство для владельца

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6. Check and replace hose
7. Insure proper termination
8. Change pressure switch
12.19 55 - High pressure control
switch close
12.19.1 Description
The high pressure control (or switch) should not be
closed when the inducer is not running. If it is, this is
a sign of a serious condition. The switch may be welded
closed or purposely bypassed in the field. Before any
heat cycle can begin, the pressure switch is tested to
make sure that it is opened.
12.19.2 Causes
1. Faulty switch.
2. Pressure switch physically bypassed in the field.
3. Loose or faulty wiring.
4. Abnormally high negative pressure present on vent
system without inducer running.
12.19.3 Solutions
1. Replace high pressure control (switch).
2. Remove bypass and restore correct operation. De-
termine reason for bypass (e.g. vent length too
long) and correct issue. Notify homeowner and
proper authorities of illegal tampering if necessary.
3. Check wiring and connections. Replace and/or re-
pair as necessary.
4. Check for proper venting and terminations as de-
fined in the furnace installation instructions.
12.20 57 - High pressure control
switch open
12.20.1 Description
This fault indicates that the high pressure switch is open
when the inducer is energized at high speed. This fault
can be displayed any time during the heat call except dur-
ing low heat call and only after the pre-purge and blower
on delays are complete.
12.20.2 Causes
1. Blockage or improper termination in either the inlet
or exhaust vents.
2. The flue vent length and/or number of elbows ex-
ceed the maximum number specified.
3. Faulty or disconnected inducer.
4. Faulty control board (inducer relay).
5. Loose or faulty wiring.
6. Disconnected, blocked, split or cut pressure switch
hoses.
7. Wind gusts (sporadic).
8. Faulty pressure switch.
12.20.3 Solutions
1. Check the vent system for blockage and proper ter-
mination and repair as necessary.
2. Check the specification sheets and/or installation
instructions. Remove excess venting.
3. Repair or replace inducer and/or inducer wiring
and/or electrical connections.
4. Replace control board.
5. Check wiring and connections. Replace and/or re-
pair as necessary.
6. Replace hoses as necessary.
7. Insure proper termination.
8. Replace the pressure switch.
12.21 68 - No blower
communication
12.21.1 Description
If the furnace was in heating operation when this fault oc-
curred, the gas valve will immediately close (flame will be
lost), blower motor operation will immediately stop and
the furnace will shut down normally with Inducer post-
purge at the correct speed. After the post purge (or im-
mediately if no heat call was present), no other opera-
tion (including thermostat calls) will occur until this fault
is cleared.
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