A.O. Smith TWI 35-200, Инструкция по установке, эксплуатации и обслуживанию

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Code and
description Cause Measure
XA5-XXXX
(lock out error)
Temperature error
High temp limit exceeded
The temperature in the tank is above
95ºC. Refer to indication X54-XXXX (see 12.1.3).
- Make sure that the wiring between
1 and 4 of J9 is connected and not
damaged.
- If necessary, replace or reconnect the
wiring.
- When the wiring is reconnected, reset
the controller.
X48-XXXX
(blocking error)
Sensor error
Open circuit of
temperature sensor
Sensor is not (correctly) connected. - Make sure that the connector is
connected to J10.
- Make sure that the wire is connected
to the sensor.
Damaged wiring and/or defective sensor. Replace the wiring and/or the sensor.
X46-XXXX
(blocking error)
Sensor error
Short circuit of
temperature sensor
Short circuit in the sensor circuit. Replace the wiring and/or the sensor.
X57-XXXX
(lock out error)
Short circuit flame sensor
Electrical connection between flame
sensor and tank or burner. - Make sure that the flame sensor does
not touch the tank.
- If necessary, replace the flame sensor.
- Make sure that the combustion
chamber is dry.
- Make sure that the cables of the flame
sensor are correctly connected.
- If necessary, replace the connector of
the flame sensor to the correct
connection.
XAC-XXXX
(blocking error)
Air proving switch
error
Switch is not closed when
fan is running during pe-
purge
Hoses are damaged. - Make sure that the hoses, between
the air proving switch and fan and the
air proving switch and gas control
valve are not damaged and reset the
controller.
- If necessary replace the hose(s).
- When the hose(s) are replaced and
reconnected, reset the controller.
Wiring is damaged. - Make sure that the wiring, between
the air proving switch and the
controller, is connected and not
damaged.
- If necessary, replace the wiring or
reconnect the wires.
- When wires are replaced or
reconnected, reset the controller.
Leakage of air between venturi and air
connector. - Make sure that the air connector is not
damaged. If necessary, replace the air
connector.
- Make sure that the hose is properly
connected to the venturi. If necessary,
tighten the clamp.
76 Installation, Maintenance and Service part