Document And Keep A Record Of All System Settings; Troubleshooting - Honeywell AQ25A Series Technical Reference Booklet

AQ251 SERIES BOILER RESET CONTROL PANELS
7 DOCUMENT AND KEEP A RECORD
OF ALL SYSTEM SETTINGS
After the AQ251 Series Control Panel and any AQ255/AQ257
Expansion Zoning Panels have been set up and the entire
hydronic installation is operating properly, it is important to
document all the system settings for future reference.
Job Records
All AQ2000 Series Panels are shipped with Installation Job
Records for documenting these settings. These should be filled
out completely and saved in the Installing Contractor's files.
NOTES: There are two classes of settings used by the AQ251
to control the operation of the heating system, Zone
Settings and System (or Equipment) Settings. Both
types of settings are stored in non-volatile memory
and are not lost following an extended power
disruption.
WHEN USING AQ1000 THERMOSTATS
1. Zone Settings are designed to be adjustable by the
user or the installer and are stored in the faceplate
of each zone's AQ1000 thermostat. These settings
are not saved with the SAVE SETUP operation. If
the faceplates of two AQ1000 thermostats are
switched, the settings (setpoints, zone minimum,
zone maximum, etc.) will also be switched.
2. System Settings are designed to be adjustable
only by the system installer and are stored in the
AQ151 Control Module. These are the settings
that are saved with the SAVE SETUP operation.
SAVE Feature
In addition to the hardcopy Installation Job Records, the
AQ251 Control Panel has a convenient SAVE feature that
allows the installing contractor to save the specific equipment
setting for this installation in the AQ251's memory for future
recall, in case the system's settings are inadvertently changed.
This feature is found in the EQUIPMENT SETUP >
SAVE/RESTORE sub-menu.
There are three levels of settings in the AQ251's memory –
CURRENT, FACTORY and SETUP.
• CURRENT settings are the settings that are currently
displayed in any of the menus and are the settings that the
AQ251 uses to operate. Any time a value is changed in any
of the menus, the CURRENT settings are changed and
these new settings are instantly used by the AQ251 Control
Panel.
• FACTORY settings are the default values loaded at the
factory and are the starting point for programming the
AQ251. These values are permanently stored in memory
and cannot be over-written or erased. The AQ251 can be
restored to factory settings through the RESTORE
FACTORY option in the SAVE / RESTORE sub-menu. A
warning prompt, RESTORE FACTORY—ARE YOU
SURE?, displays and YES or NO must be chosen before
proceeding. If YES is selected, the FACTORY settings are
be copied to the AQ251's CURRENT settings and the
Control Panel begins to operate with these values
immediately.
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• SETUP settings are the specific settings for this installation
which an installer has saved after the AQ251 is set up and
operating well. These are saved for future recall, in case the
system's settings are inadvertently changed.
— To save this installation's settings for the first time, go to
the EQUIPMENT SETUP > SAVE/RESTORE sub-
menu. Position the indicator arrow (←) beside SAVE
SETUP and press OK. This saves the current system
settings to the SETUP values.
— To retrieve the SETUP values at any time in the future,
go to the EQUIPMENT SETUP > SAVE / RESTORE
sub-menu and select RESTORE SETUP to load those
values into the AQ251 as the CURRENT settings. The
system will now operate according to these retrieved
settings.
— If the current settings are modified after a RESTORE
SETUP operation is performed, simply select SAVE
SETUP again to overwrite these new settings into the
SAVE settings memory.
CAUTION
If you change any system settings after a
RESTORE SETUP operation, you change the
current settings that the AQ251 uses as its basis of
operation.

TROUBLESHOOTING

The following information helps the installer correctly identify
system problems, making troubleshooting much faster.
Table 3 and Table 4, beginning on page 22, describe the
possible error codes and status notices that can be
communicated on the AQ155 / AQ157 Zoning Modules'
diagnostic LEDs.
System Status Information
To aid in troubleshooting hydronic systems controlled by an
AQ251, the operational status of the system is shown on the
System Status page. Status notices and error messages
display here as appropriate, i.e., only those that are pertinent
to the system's current operation will be displayed. See Table 4
on page 22 for a complete list of status notices and error
messages. The System Status page is available from the User
Menu.
When a new AQ2000 component is connected on the
AQUATROL network, its settings are communicated to the
AQ251 Control Module within 10 seconds of being connected.
If the component is an AQ1000 thermostat, the setpoints for
that zone thermostat can be modified from the AQ251 Control
Module as soon as it is recognized.
When an AQ1000 thermostat is disconnected from the
AQUATROL network, a message displays on the System
Status page of the AQ251 indicating "Lost Zone A-xx", where
"xx" is the specific identity, or address, of the lost zone. This
helps the servicing contractor quickly identify the lost zone and
fix its wiring to re-establish communication with the AQ251
Control Module.
This diagnostic information is very valuable and the System
Status page is the first place a contractor should look for
information when troubleshooting system problems.
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