Page 182
STAT
IM 2000/2000S
Service Guide
96-106775 Rev 5.0
8. Water Pumps, Reservoir, and Compressor
Troubleshooting reservoirs with float and
water quality sensors
In 2008, SciCan introduced a new type of water reservoir fitted with a water quality sensor AND
a float switch. In the past, the low water level indication was performed by the water conductivity
sensor. If the sensor measured the conductivity to be between 0.0 and 0.3 μS/cm, (the minimum
default setting in the software is 0.3 μS/cm) the unit would notify the user to “REFILL RESERVOIR”
even though the reservoir was in fact filled above the sensor.
As the water quality of many water suppliers has improved of late, some Rev. 7.x controller
STAT
im
users may find this “REFILL RESERVOIR” message appear, and as the conductivity
sensor in the unit cannot be set to 0.0 μS/cm, as the unit would run even without water, the float
was introduced to enable extremely pure water to be used without an error message.
To determine if your STAT
IM unit has a water reservoir float switch, enter the Service Menu and
proceed to the “CONDUCTIVITY SETUP” option and observe the L= value.
The display should be similar to the example below.
Screen Representation
xx.x
= Water conductivity in μS.
NNN
= Conductivity measurement in ADC (Analog to Digital) counts (0…255)
y.y
= water conductivity in ppm (parts per million).
LL.L
= Numerical threshold in uS below which the unit thinks it is out of water OR
float identifier (see below).
HH.H = High valve threshold (Bad water threshold - values larger than this trigger
“Water Quality Not Acceptable” error.
G.GG = Water conductivity circuit gain
If the
l=
value reads “
FloAT
”, the unit has a water float switch.
If the
l=
is a numerical value (e.g.
0.3 uS
) then the unit has no water float switch.
The float sensor in this reservoir will ONLY work with STAT
IM 2000/5000 units with revision 7
controller board or higher AND have the following software revisions or higher:
- S201R605, S202R605, S2E2R605, S2S2R605, S2S9R605
- S5S2R605, S501R605, S503R605, S502R605, S5S2R605, S5S9R605
If replacing a reservoir for a unit
without
a revision 7 controller board, the reservoir
without
float
(with water conductivity sensor) can be ordered.
If replacing a reservoir on a unit
with
a revision 7 controller board and software lower than as listed
above, the reservoir with float switch (and water quality sensor) can only be used if the software is
upgraded to the latest revision.
STAT
IM
5000/5000S/5000 G4 Service Guide
CD=xx.xuS/NNN/y.y ppm
l=ll.l
H=HH.H
G=GG.G
