Low Water
Water level has fallen below an
acceptable operating level.
Increase pressure to normal range.
If problem persists,
call for service
E37
Lockout reference code
. Refer to “In case of Prob-
lem...” on page 8 for more information.
Body text.
The first sentence describes the lockout,
the second sentence gives a possible cure, and the
third tells how to reset the lockout.
Lockout message
. Refer to “In case of Problem...”
on page 8 for more information.
Stand-by
84°C
61°C
Target = --
WaterMaster
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WaterMaster 25 - 35 - 45 - 70 - 85 - 120 : A1006482 - 664Y7300 • D
USER’S GUIDE
LOCKOUT SCREEN
If a problem occurs, the Lockout screen replaces the Home screen. The backlight also remains on as long
as the problem is not solved. Pressing any arrow button will return to the Home screen.
Using the code located in the right bottom corner of the screen, troubleshoot the problem, either with
the table located in paragraph “In case of Problem...” on page 8, or with the Lockout code table in the
Installer’s Handbook (for the installer only).
STAND-BY SCREEN
This screen is displayed at start-up. It indicates that the WaterMaster is ready to respond when a demand
is received.
STATUS MESSAGES
Stand-by
Indicates that the WaterMaster is ready to respond when a demand is received.
DHW Demand
A domestic hot water call has been received.
Manual Operation
The burner or circulators have manually been enabled in the Installer Menu.
DHW Burner Delay
The burner will not fire until the call blocking time has elapsed.
DHW Setpoint Reached
The burner is not fired because the supply/system water temperature exceeds
the setpoint. The domestic circulator continues to operate and the burner will
fire again once the supply/system water temperature drops below the setpoint.
DHW Post Pump
The domestic hot water circulator is running to remove heat from the Water-
Master at the completion of a call.
Freeze Protection
The burner is fired because the freeze protection feature has been activated.
Freeze protection will end once the supply/system water temperature is raised
to16°C.
Boiler Protection
The burner firing rate is being reduced because of an excessive difference be-
tween the appliance supply and return temperatures. The firing rate will begin
increasing once the temperature difference is less than25°C.
Lockout Description
The lockout which currently has the WaterMaster shut down is displayed
