Operating Your Cs92A Hot Water Thermostat; Basic Operation / Battery Replacement / Error Indications; Battery Replacement - Honeywell Y9420S User Manual

OPERATING YOUR CS92A HOT WATER THERMOSTAT

Basic Operation
Your CS92A consists of a sensor element that
is strapped to the metal surface of the hot
water cylinder and a wireless transceiver box
that is normally mounted on a wall surface
apart from the cylinder. The transceiver
communicates with the ST9420C programmer
and regularly sends the hot water temperature
measurement to it.

Battery Replacement

The CS92A batteries should last for a minimum of 2 years. Well before they run out,
CS92A will communicate with ST9420C and it will show the message 'SENSOR LOW
BATT' whilst also flashing the tap symbol.
Batteries are accessed by
unclipping the front cover
at the bottom. Note battery
polarity. Reverse process
to refit front cover.
Use 2xLR6 (AA) alkaline
batteries only.
Error Indications
To save battery power, CS92A will indicate
error conditions on the LoT™ Display of
ST9420C. It is possible to view the CS92A sta-
tus by pressing the button on the transceiver
box. The lights underneath this button will
provide feedback as shown in the table. Go
to the FAQ AND TROUBLSHOOTING section
for more information.
Green Light Red Light
On Flashes up to 5 times in
succession, then repeats
Off Flashes 0.1 s on, 0.9 s off Battery low condition, replace batteries
Off Flashes 0.5 s on, 0.5 s off Sensor error, check sensor connection
Off On continuously
Sensor element
Status
Everything is OK, red light shows signal
strength - press button again to exit
Loss of communications
Transceiver
1
2
25