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