Elite EL-110 LP, Руководство по установке

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Boiler Manual
PART 12: TROUBLESHOOTING
(CONTINUED)
D. USER INTERFACE DISPLAY
Cascade Control FAULT Codes
Fault Code EO3
System Sensor Failure
SYS SUPPLY SENSOR
PUMP OFF
E03
Description:
This screen shows that there is a problem with
the system sensor circuit. The circuit could be
either open or shorted. Possible reasons for this
error to be present are:
•
There is no system sensor connected to the
master boiler
• The system sensor is faulty
• There is a short circuit in the system sensor
wiring; possibly from a staple placed
through the wire or damage to the wire
causing both conductors to touch.
• The system sensor wiring is open due to
defect or damage.
Remedy:
Disconnect the system sensor from the wiring and
measure the resistance of it. Compare the meas-
ured resistance to the table in this manual to see
if it corresponds to the temperature of the sensor.
If the resistance does not agree with the tempera-
ture of the sensor, replace the sensor. If the sensor
is OK, disconnect the sensor wiring from both the
boiler and the sensor and check continuity using
an ohmmeter. Repair or replace as necessary.
If this error is present, all boilers in the cascaded
group will run and ignite simultaneously when
there is a heat demand. Each boiler will modulate
to maintain set point temperature on its own sup-
ply sensor. The code will reset automatically when
repair is complete. This code will not display if
System Setting Function ERROR SYSTEM SENS
is set to OFF.
Fault Code TT
Temperature Blocking TT demand
TEMPER BLOCKING
PUMP ON
TT
Description:
This screen shows that there is a demand on the
boiler from the TT circuit and that the pump is
powered on and the temperature of the water at
the supply sensor is too high for the boiler to
ignite. This occurs because the water tempera-
ture measured by the supply sensor is higher
than the central heat setting – Central Diff
Setting, when a demand from the TT circuit is
placed on the boiler. This message will stay
present until the water temperature measured
by the supply sensor is less than the Central
Heat Setting – Central Diff Setting.
Fault Code DHW
Temperature blocking DHW demand
TEMPER BLOCKING
PUMP ON
DHW
Description:
This screen shows that there is a demand on the
boiler from the DHW circuit and the pump is
n
CAUTION
This appliance has wire function labels on all internal
wiring. Observe the position of each wire before re-
moving it. Wiring errors may cause improper and dan-
gerous operation. Verify proper operation after servicing.
n
CAUTION
If overheating occurs or the gas supply fails to shut
off, do not turn off electrical power to the circulating
pump. This may aggravate the problem and increase
the likelihood of boiler damage. Instead, shut off the
gas supply to the boiler at the gas service valve.
n
WARNING
Do not use this appliance if any part has been under
water. Improper or dangerous operation may result.
Contact a qualified service technician to inspect the
boiler and to repair or replace any part of the boiler
that has been under water prior to placing the boiler
back in operation.
n
DANGER
When servicing or replacing components that are in
direct contact with the boiler water, be certain that:
• There is no pressure in the boiler. (Pull the release
on the relief valve. Do not depend on the pressure
gauge reading).
• The boiler water is not hot
• The electrical power is off