John Wood Commercial - AJWSC - Manual (Page 21)

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Display Shows Display Shows
no display
no display
no display
Main gas valve disconnected
Pilot gas valve disconnected
Secondary disconnect
Line disconnect
Sensor 2 disconnected
Sensor 1 disconnected
Description
Valve control disconnect
Damper quick connector
disconnect
Primary disconnect
Description
Calling for heat
Opening damper
Open gas valve
ECO cut off
Thermostat satisfied
Pilot igniting (90 seconds)
Waiting for ignite (60 seconds)
Ignition failed lock out (after 3
trials)
Successful sense igniting
Figure 18 Display readout definitions (Operational Status codes)
atmosphere, make sure air circulation around the integrated
control and the gas valve is adequate to prevent condensa-
tion. It is also important to regularly check out the system. A
NEMA 4 enclosure may be needed.
Water or Steam Cleaning
Once an integrated control or gas valve has been wet, it
may operate unreliably and must be replaced. If the appli-
ance is likely to be cleaned with water or steam, the controls
and associated wiring should be covered so that water or
steam cannot reach them. The controls should be high
enough above the bottom of the cabinet so they will not be
subjected to flooding or splashing during normal cleaning
procedures. If necessary, shield the controls to protect them
from splashing water. A NEMA 4 enclosure is recommend-
ed for the ignition module.
Operating Instructions
The on-board user interface consists of three push-button
switches (“HOTTER”, “COOLER” and “MODE”) and a three-
digit, 7-segment LED display (see Figures 16 & 17).
Together these controls can be used to view system set-
tings and status as well as set some control parameters.
The integrated control is active only while power is applied
and can be set to one of three different modes: "Reading",
"Installer" or "Error” (explained below).
Figure 16 Integrated Control
(View as installed)
(View with cover removed)
“COOLER”
Button
“MODE”
Button
Display “HOTTER“
Button
Figure 17 Integrated Control (Details)
Operational status codes
This mode is used to display the operational status of the
integrated control. If an “Err” code is being displayed, press
and hold the “COOLER” button for 3 seconds to reset. To
reset temperature set point, make sure the heater is not
fired on. Press and hold the “HOTTER”, “COOLER” and
“MODE” buttons simultaneously for 5 seconds until “SP” is displayed. Press the (HOTTER) button to increase
and (COOLER) button to decrease the temperature set
point. When the set point is reached, press and hold the
“HOTTER”, “COOLER” and “MODE” buttons again for 5
seconds. The display should now be back to normal show-
ing “StA” and “SP”.