USER GUIDE

Safety shutdown

If an operating error develops, the system locks and the display flashes: the first digit shows the sequence the burner was in when the error occurred, the last two digits show the error code (see table below); the first digit and the next two flash alternately.

To reset the system:

•Press the “RESET” button on the MCBA display.

•If an error occurs again, call an approved heating engineer.

Table of error codes and corrective action

codes

Error description

Fault repair

00

No flame detected

- check wiring / - change electrode / - change MCBA

 

 

 

02

No ignition after 5 attempts

- check ignition electrode and its positioning

03-07

Internal error

- if the problem persists after 2 resets, change the MCBA

 

 

 

11

Eprom error

- if the problem persists after 2 resets, change the MCBA

12

Low water pressure or 24V fuse failure

- top up the primary circuit (see Using The Boiler - Heating System Pressure).

 

 

- call engineer to check fuse

 

 

 

13-17

Internal error

- if the problem persists after 2 resets, change the MCBA

18

Primary temperature 1 > 110 °C

- check that sensor NTC1 is propely housed in its pocket

 

 

- if so, change sensor NTC1

 

 

 

19

Primary temperature 2 > 110 °C

- check that sensor NTC2 is propely housed in its pocket

 

 

- if so, change sensor NTC2

25

Primary temperature 1 gradient too high

- check that the shunt pump is operating, and if so vent the boiler

 

 

 

28

No fan signal

- if the fan is turning:

 

 

 

• check the PWM connection

 

 

 

• if the problem persists after 2 resets, change the fan

 

 

 

• if the problem persists after 2 resets, change the MCBA

 

 

- if the fan is not turning:

 

 

 

• check the 230 Volt power to the fan

31

Short circuit in temperature 1 sensor

-

change sensor NTC1

 

 

 

 

32

Short circuit in temperature 2 sensor

-

change sensor NTC2

33

Hot water temperature sensor

-

change sensor NTC3

 

 

 

36

Temperature 1 sensor: circuit open

- check the connection of sensor NTC1 to the terminal strip

 

 

- if the problem persists, change sensor NTC1

37

Temperature 2 sensor: circuit open

- check the connection of sensor NTC2 to the terminal strip

 

 

- if the problem persists, change sensor NTC2

 

 

 

38

Hot water temperature sensor: circuit open

- check the connection of sensor NTC3 to the terminal strip

 

 

- if the problem persists, change sensor NTC3

44

Internal error

- if the problem persists after 2 resets, change the MCBA

 

 

 

 

17

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Casablanca Fan Company HM 101, HM 71 manual Safety shutdown, Table of error codes and corrective action, To reset the system
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HM 101, HM 71 specifications

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