Honeywell R7426B Product Data page 11

Standard Display Mode
After power-up, the controller version and revision number
blink for approximately 20 seconds (See Fig. 18) and then the
controller enters standard display mode (see Fig. 17). In this
mode, selected input/output values are displayed.
1 WHEN POWER IS APPLIED, THE DISPLAY
FLASHES MODEL CODE:
1
M17455
Fig. 18. Controller Version.
Parameter Selection/Adjustment Mode
Use this mode for application configuration:
1. Press and hold the + and - buttons to display parameter
selection mode.
2. Press + or - until the desired parameter is displayed.
3. Press SET to enter adjustment mode.
4. Use + and - to adjust parameter to desired setting.
5. Return the controller to selection mode using either:
a. SET places the parameter value into the EEPROM.
b. SEL discards the change.
To Display Actual Values
In standard display mode, one of all listed below actual values
can be selected and displayed (see Table ) by pushing SEL.
OR
ADJUSTMENT
TO ADJUST
VALUE
OUTPUT FIXING
OUTPUT FIXING
RELEASE OF
OUTPUT FIXING
Output Manual Override Mode
Output selection mode displays the output value and indicates
manual overrides. An activated manual override is indicated
by a displayed F (fixed). Use this mode for manual override. It
is especially useful during installation and setup:
1. Press and hold the SET and SEL buttons to display
output data selection mode.
2. Press +or - until the desired output is displayed.
3. Press SET to enter adjustment mode.
4. Use + and - to adjust the output to the desired value.
5. Return the controller to selection mode:
R7426A:
R7426B:
R7426C:
SET
SET
OUTPUT OUTPUT
SELECTION
MODE MODE
SET
NO
SEL
AND
Fig. 19. Operating Overview.
Display
hour:minutes
month.day.year
I01
CP.1
I02
CP.2
I03
O1
O2
O3
Resetting Parameter Values to Default
To reset all parameter values to default (see Tables 13 and 14
for default values):
1. Press and hold the + and - buttons prior to and during
power up.
2. When the display flashes dEF, release the buttons.
NOTE: Setting the DefProg parameter (C.23) to 1
Time out
After approximately 10 minutes of inactivity (no buttons
pressed) the controller automatically returns to standard
display mode. Inputs not yet confirmed by the SET button are
discarded and old parameter values retained.
AND
SEL
AND
PARAMETER/
STANDARD
CONFIG.
DISPLAY
SELECTION
MODE
SEL SEL
a. SET changes the output to fixed.
b. An activated manual override is indicated by an F
(fixed) on the display.
c. SEL discards the change.
6. To disable the manual override:
a. Repeat steps 2 and 3.
b. Press and hold + and - until the device displays rEL.
NOTE: Before exiting manual override, disable all
7. To exit manual override, press SEL.
NOTE: If necessary, repeat step 6.
11
R7426A,B,C TEMPERATURE CONTROLLER
Table 9. Standard Displays.
Description
Clock (A = am, P = pm)
Date
Main Sensor I01
Main Setpoint CTRP1
Limit or Cascade Sensor I02
Limit/Cascade Setpoint CTRP2
Outdoor Air Compensation Sensor I03
Output 1
Output 2
Output 3
resets parameter values to default.
SET
PARAMETER/
CONFIG.
ADJUSTMENT
MODE MODE
SET
NO PARAMETER
SEL
VALUE CHANGE
overrides according to step 5.
OR
TO ADJUST
VALUE
M21038
63-2564—1