John Wood Commercial - AJWSC - Manual (Page 22)

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Error mode
When the integrated control detects a failure condition it
enters Error mode. In this mode the display alternates
between showing “Err” and an error code number, display-
ing each for one (1) second. The display characters for each error and their definitions are shown in Figure 21. While in
Error mode the functions of the buttons are disabled. The
integrated control returns to Reading mode only if all error
conditions are cleared.
Reading mode
The integrated control defaults to Reading mode after a
reset. This mode is for information display only and no
adjustments can be made to parameter settings. The dis-
play characters for each parameter and their definitions are
shown in Figure 19. Use the “MODE” button to cycle through the available parameters. Once a parameter is
selected, the (HOTTER) and (COOLER) buttons are
used to view the value of the selected parameter. If no but-
ton is pressed, the display will cycle through the parameter's
name, value and unit at one (1) second intervals.
Text Description Display Shows Text Description Display Shows
loc
Reset the Hard Lockout
Flag
F-C Set mode to °F or °C
rst
Reset the Soft Lockout
Timer
sp_ Set the Setpoint mode
Figure 20 Display readout definitions (Installer mode)
Display Shows Display Shows Description
Flame was sensed out of normal
sequence
Flame was sensed during pre-
purge
Description
AC line frequency error
AC line voltage error
Over Temperature error - ECO
limit exceeded
Flame Rod shorted to burner
ground
Line volage unstable
Soft Lockout - Max number of
retries exceeded
Soft Lockout - Max number of
recycles exceeded
Soft Lockout - Electronics failure
Atmospheric Damper End Switch
failed to open
Flame was sensed during post-
purge
Temp. sensor(2), interface or A/D
conversion failure
Temp. sensor(1), interface or A/D
conversion failure
Atmospheric Damper End Switch
failed to close
Figure 21 Display readout definitions (Error mode)
Installer mode
The integrated control must be in installer mode in order for
the parameters (see Figure 20) to be adjusted. This mode is
entered by pressing and holding all three buttons simulta-
neously for about three (3) seconds. Repeating this action,
or if no key is pressed for 60 seconds, will set the integrat-
ed control back to Reading mode. Use the “MODE” button to cycle through the available parameters. Once a
parameter is selected, use the (HOTTER) and (COOL-
ER) buttons to adjust the value of the selected parameter. If
no key is pressed, the display cycles through parameter
name, value and unit at 1 second interval for 60 seconds
before returning to Reading mode.
Text Description Display Shows Text Description Display Shows
sta Current State °F
Temp. Displayed is in
Degrees Fahrenheit
fla Flame Current (Measured) °C
Temp. Displayed is in
Degrees Celsius
sp Current Setpoint uA
Units Displayed are in
Micro Amps
s1t
Current Sensor 1
Temperature (Limit)
off Input or Output is Off
s2t
Current Sensor 2
Temperature (2-wire)*
on Input or Output is On
hr Heat Request Status
Figure 19 Display readout definitions (Reading mode)