AQUATROL ZONE SYNCHRONIZING INJECTION/MIXING BOILER RESET CONTROLS
7
69-1990—03
When a new AQ2000 component is connected on the
AQUATROL network, its settings are communicated to the
AQ252's Boiler Control Module (AQ15200B) within 10
seconds of being connected. If the component is an
AQ1000 thermostat, the setpoints for that zone
thermostat can be modified from the Boiler Control
Module as soon as it is recognized by the Control Module.
When an AQ thermostat is disconnected from the
AQUATROL network, a message displays on the System
Status page of the AQ252 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 Control Module.
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).
MIN. RETURN PROT
n/a
The temperature measured by the return sensor is at or below the minimum return
water temperature.
NO DHW PROBE
n/a
No DHW sensor connected or it is defective.
NO LINE VOLTAGE
n/a
No line voltage has been detected on the N and L terminals on the line voltage input
to the control module.
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 SECOND. PROBE
n/a
No secondary (mixed) loop 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 AQ252.
WWSD ACTIVE
n/a
Zone calls for heat is not served because WWSD (Warm Weather Shutdown) is in
progress.
Table 2. LCD Status Notices and Error Messages. (Continued)
LCD Display
Parameter
Meaning
