Honeywell R7426C, R7426B Displaying Actual Values, Selecting Parameters, Selecting Output Values

R7426A,B,C TEMPERATURE CONTROLLER WITH AND WITHOUT REAL-TIME CLOCK

Displaying Actual Values

In the standard display mode, one of nine actual values, the actual time, or the date can be selected and displayed by pushing the SEL button.

The icons of the permanently displayed controller mode are described in the following table:

Table 13. Icons

	controller mode / status	display
Off		OFF - icon
Night1)		Moon - icon
Standby		Halfsun - icon
Comfort		Sun - icon
Freeze Protection Alarm and		Freeze protection icon in
Operation2)		addition
Low battery 1) 2) 3)		Battery icon
Optimum Start 1)		Sun icon is flashing ≈ 1Hz
1)	On controllers with real-time clock, only.
2)	Status information is displayed together with actual icon
3)	for the controller mode.
	In order to improve battery lifetime, low battery detection

FIRST DISPLAYED CONFIGURATION PARAMETER:

FOR R7426C

FOR R7426A,B

NOTE: CONTROL OR CONFIGURATION PARAMETERS WHICH ARE NOT AVAILABLE ON THE GIVEN CONTROLLER VERSION ARE SKIPPED.

°C

°C

ACTUAL

PARAMETER

VALUE

is performed only once a day and after power up.

If a displayed date is programmed to be a holiday, the corresponding holiday icon is displayed on controllers with real-time clock.

Selecting Parameters

The parameter/configuration selection mode is used to select control and configuration parameters (Fig. 9) for adjustment. The displayed parameter no. corresponds with the number in Table 4 and Table 5. Default programming is indicated by a display of def.

Pushing the + or - button scrolls through the parameter list. Pushing the SET button enters the adjustment mode.

Adjusting Configuration / Parameter Values

The adjustment mode is used to adjust configuration and parameter values (Fig. 10). In this mode, the selected para- meter no. is displayed and the corresponding value flashes.

Pushing the + or - button increments or decrements the value of the selected parameter. Ranges are shown in Table 4 and Table 5. An adjustment example is shown in Fig. 18.

Pushing the SEL button retains the old parameter value. Pushing the SET button accepts the parameter value and returns to parameter/configuration selection mode.

Resetting Param. Values to Default Values

Pushing simultaneously the + and - button during the power up or setting the control parameter DefProg to 1 resets all control and configuration parameters to defaults (see Table 4 and Table 5). Default programming is indicated by a display of

def.

Fig. 9. Parameter/Configuration Selection Mode

OR	TO ADJUST	°C
	PARAMETER
	VALUE

Fig. 10. Parameter/Configuration Adjustment Mode

Selecting Output Values

The output selection mode is used to select the output no. (see Fig. 11) for manual override adjustment. An activated manual override is indicated by a displayed F (fixed).

Pushing the + or - button scrolls through the output list. Pushing the SET button enters the adjustment mode.

Manually Overriding Output Values

The output adjustment mode is used for manual override adjustment of output values (see Fig. 12). In this mode, the selected output no. is displayed and the actual output value flashes.

Pushing the + or - button increments or decrements the value of the selected output for manual override purpose. The output range is displayed in correspondence with the nominal control range.

To return to output selection mode, three options are available:

•Pushing the SET-button after adjustment activates the manual override (fixing) of output value.

•Pushing the SEL button, causes that the output value is still determined by the control loop (no fixing).

EN1B-0203GE51 R0507C 14