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CONTROLLER
Key to Controls
Temperature set / Information menu
Decrease / Scroll Down
Increase / Scroll Up
Unit running indicator
Evaporator fan running indicator
ADJUSTING THE OPERATING
TEMPERATURE
The thermostat is built in to the controller and is
adjustable between factory set parameters.
All units are factory pre-set, however conditions
on site will vary compared with test conditions
and it maybe necessary to perform the following
adjustments in order to obtain a perfect
temperature cycle.
ADJUSTMENT OF CONTROLLER
To adjust operating temperature, press and hold
key for 3 seconds. Use
PROBE FAIL SAFE FEATURE
The controller features a fail-safe condition. In
the event of a temperature probe failure, the
compressor will alternate at 5 minute intervals
indefinitely between 'running' and 'not running' and
E1 or E2 will be displayed. Normal compressor
function will only be restored when the probe fault
has been repaired.
Should a probe failure occur please contact Williams
Refrigeration Spares Office on +44 (0) 1553 817000
for a replacement part stating the unit's serial
number.
INFORMATION VIEW MODE
A single press of
will activate information view
mode. It is possible to scroll forward through the
references with
and backwards with
To view a result, scroll to desired reference, press
and hold
, release
automatically move to next parameter.
To exit information view mode,
simultaneously or wait 10 seconds and controller
will exit automatically.
It is possible to clear recorded values of HI, LO and
CR by pressing
or
relevant reference by holding button marked
The following parameters are available for viewing:
6
keys to adjust.
.
to stop viewing and
and
when viewing the value of
T1
Current air probe temperature
* T2
Current evaporator probe temperature
* T3
Current auxiliary probe temperature
** Hi
Highest recorded cabinet temperature
** Lo Lowest recorded cabinet temperature
cr
Number of weeks since last condenser clean
* =
Optional (will only appear in information
view mode if parameter T2 is set to YS and/
or T3 is set to NO/AU/FP).
** =
If parameter T3 is set to FP, HI and LO
temperatures will be logged from auxiliary
probe.
If T3 is not set to FP, HI and LO temperatures
will be logged from air probe (T1).
HUMIDITY DISPLAY
The humidity display indicates the cabinet's internal
relative humidity.
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