Casablanca Fan Company HM 71, HM 101 manual User Guide, Control Settings, Standby Mode

USER GUIDE

CONTROL SETTINGS

The boiler is controlled by the MCBA (microprocessor), with the control panel housed behind a flap on the front of the boiler - see picture on page 16.

Standby Mode

Standby Mode is the normal operation display setting.

The first digit shows the boiler sequence. This sequence relates to current boiler status. The last two digits show the boiler temperature.

Sequence	Boiler status
0	Stand By, no heat request
1	Pre-purge, post-purge
2	Ignition
3	Burning in CH-mode
4	Burning in DHW-mode
5	Waiting for opening of Air pressure switch (max. 1 Min.)
	Waiting for closing of Air pressure switch (max. 2 x 1 Min.)
6	Burner off because the set-value has been reached
7	Overrun time pump in CH-mode
8	Overrun time pump in DHW-mode
9	Burner off because of protection:
	(automatic restart occurs when the condition has cleared)
	• “b08”: airflowsensor did not close
	• “b18”: T1 > 95 °C
	• “b19”: T2 > 95 °C
	• “b24”: T2 - T1 > 10,20 or 40 °C after 19 minutes
	• “b25”: dT1/dt > Maximum Gradient T1
	• “b26”: Minimum gas pressure switch not closed
	• “b28”: no fan signal
	• “b29”: fan signal, incorrect fan rotation
	• “b30”: T1 - T2 > Max. delta
	• “b33”: NTC3 short circuit
	• “b35”: NTC5 short circuit
	• “b38”: NTC3 open circuit
	• “b40”: NTC5 open circuit
	• “b52”: T5 > T5max
	• “b61”: airflowsensor closed
	• “b65”: wait for fanstart
A	Internal control
G	Burner on for holding boiler warm
H	Burner-high function: Testmode max. RPM in CH-mode
L	Burner-low function: Testmode min. RPM in CH-mode
t	Burner on for manual fanspeed (servicing)

If the burner is turned off because of an extra protection, the display shows boiler-sequence 9 and the flow-temperature. This alternates with the error code eg. b26.

0 8 0

Changing the MCBA settings: Parameter mode

Proceed as follows:

•Press the “MODE” button once; the display will show “PARA”. Press the “STEP” button once; the first digit is “1” and the last two show the setting for the first parameter.

•To change these last two, press “+” to increase and “-” to decrease.

•Save the new setting selected with the “STORE” button.

•To access the next parameter, press “STEP”.

•Press the “MODE” button twice to return to standby mode.

List of accessible parameters:

Parameter N°	Description	Range
1	hot water setting	20 - 90 °C
2	“Hot water” system status	O = OFF; 1 = ON
3	“Heating” system status	O = OFF; 1 = ON
4	Heating setting	60 - 90 °C

Temperature measurement display: Info mode

Proceed as follows:

•Press the “MODE” button twice; the display will show “INFO”.

•Press the “STEP” button once; the first digit is the measurement number and the last two its value.

•Press the “STEP” button to display the next measurement.

•To return to standby mode, press the “MODE” button once.

List of measurements available:

Measurement N°	Description
1	Temperature T1 - primary
2	Temperature T2 - primary
3	Temperature T3 - secondary
4	-
5	-
6	Setting for T1
7	Variation of T1 - °C/s
8	Variation of T2 - °C/s
9	Variation of T3 - °C/s

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