Honeywell AQ25A Series Technical Reference Booklet page 28

AQ25A SERIES PROGRAMMABLE BOILER CONTROL PANELS
LCD Display
HEATING
IDLE
BOILER: (continued) INIT
INST PURG
INSTALL
PMP EXER
POST PURG Boiler is active with Post Purge operation and is sending the purged water to the Boiler
PURGE DHW Boiler is active with Post Purge operation and is sending the purged water to the DHW
CALL FOR COOL
CALL FOR DHW
CALL FOR HEAT
CWSD ACTIVE
DHW DISABLE
LOST ZONE A-1
...
LOST ZONE D-16
NO DHW PROBE
NO OUTDOOR PROBE
NO RETURN PROBE
NO SUPPLY PROBE
SHORT CYCLE PROT
VALVE INIT
WATER READY
WWSD ACTIVE
69-2119—02
Table 4. LCD Status Notices and Error Messages. (Continued)
Parameter
Boiler is active to serve zones.
Boiler is not active.
Boiler contacts (terminals 22-23) on the AQ152A, which are connected to the boiler's T-T
terminals, have been shorted and the boiler is beginning its firing sequence.
Boiler is active while the AQ25A is conducting the PURGE operation in the Installer
Setup.
Boiler is in ready mode during Installer Setup.
Boiler is disabled while the AQ25A is exercising all pumps and valves connected to the
AQUATROL network.
(Primary) loop.
tank.
n/a At least one zone with a programmable thermostat requires cooling.
n/a The DHW requires heat.
n/a At least one zone requires heat.
n/a Zone calls for cooling are not served because CWSD (Cold Weather Shutdown) is in
progress.
n/a DHW call is not served because it is disabled.
n/a Lost communication with a zone (A-1 to A-16, B-1 to B-16, C-1 to C-16, or D-1 to D-16).
n/a No DHW sensor connected or it is defective.
n/a No outdoor sensor connected or it is defective.
n/a No return sensor connected or it is defective.
n/a No supply sensor connected or it is defective.
n/a There is a call for heat, but less than two minutes have elapsed since the last firing of the
boiler (prevents short cycling).
n/a Motorized mixing valve controlling the secondary loop is being initialized and
repositioned (opening or closing) to meet the secondary loop target temperature.
n/a Boiler Supply Water temperature is at or above the target temperature calculated by the
AQ25A.
n/a Zone calls for heat is not served because WWSD (Warm Weather Shutdown) is in
progress.
Meaning
22