Uniflair UST500 User manual

UNIFLAIR
Instruction manual
UST500 CONTROL BOARD
E
N

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UNIFLAIR SpA policy is one of continuous technological innovation.
The Company therefore reserves the right to amend any data herein
without prior notice.
D
isposal
:
the
product
is made up of metal parts and plastic parts.
In reference to European Union directive 2002/96/EC issued on 27
January 2003 and the related national legislation, please note that:
•
••
•WEEE cannot be disposed of as municipal waste and such waste
must be collected and disposed of separately;
•
••
•The public or private waste collection systems defined by local
legislation must be used. In addition, the equipment can be
returned to the distributor at the end of its working life when
buying new equipment.
•
••
•The equipment may contain hazardous substances: the improper
use or incorrect disposal of such may have negative effects on
human health and on the environment;
•
••
•The symbol (crossed-out wheeled bin) shown on the product or
on the packaging and on the instruction sheet indicates that the
equipment has been introduced onto the market after 13 August
2005 and that it must be disposed of separately;
•
••
•In the event of illegal disposal of electrical waste, the penalties are
specified by local disposal legislation.
D
rafted by:
C
hecked by:
A
pproved by:
Munari Andrea
14/04/2010
R
EAD AND SAVE
THESE INSTRUCTIONS

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CONTENTS
HOW TO USE THIS MANUAL.......................................................................................................................................................6 
INTRODUCTION............................................................................................................................................................................7 
General Description......................................................................................................................................................................................... 7 
Typical applications: ........................................................................................................................................................................................ 7 
Technical data:................................................................................................................................................................................................ 7 
Main functions: ................................................................................................................................................................................................7 
Models and Features.......................................................................................................................................................................................7 
USER INTERFACE (FOLDER PAR/UI).........................................................................................................................................8 
Keys................................................................................................................................................................................................................8 
Keys and associated functions......................................................................................................................................................................... 8 
Local On/OFF.................................................................................................................................................................................................. 9 
Keys – combined action................................................................................................................................................................................. 10 
Manual alarm acknowledgment and reset...................................................................................................................................................... 10 
LEDs and Display.......................................................................................................................................................................................... 11 
Display........................................................................................................................................................................................................... 11 
LED: decimal point......................................................................................................................................................................................... 11 
LED: States and Operating Modes................................................................................................................................................................. 12 
LED: Values and Units of Measure................................................................................................................................................................ 12 
LED: utilities................................................................................................................................................................................................... 12 
First switch on................................................................................................................................................................................................ 13 
Access to folders - menu structure................................................................................................................................................................. 13 
“Main Display” Menu...................................................................................................................................................................................... 15 
“Operating Mode” menu................................................................................................................................................................................. 16 
‘States’ menu................................................................................................................................................................................................. 17 
View Inputs/Outputs (Ai, di, AO, dO).............................................................................................................................................................. 17 
Setting the clock (CL)..................................................................................................................................................................................... 18 
Alarm Display (AL)......................................................................................................................................................................................... 20 
Example of how to set the setpoint (SP)........................................................................................................................................................ 20 
View and Reset compressor/pump time......................................................................................................................................................... 22 
Programming menu....................................................................................................................................................................................... 23 
Parameters (folder PAr)................................................................................................................................................................................. 23 
Functions (FnC folder)................................................................................................................................................................................... 24 
Entering a password (Par/PASS folder)......................................................................................................................................................... 24 
Alarm events (EU folder)................................................................................................................................................................................ 25 
SYSTEM CONFIGURATION (FOLDER PAR/CF) .......................................................................................................................28 
Configuration of analogue inputs.................................................................................................................................................................... 28 
Configuration of digital inputs......................................................................................................................................................................... 29 
Configuration of digital outputs....................................................................................................................................................................... 30 
Configuration of analogue outputs ................................................................................................................................................................. 31 
Serial configurations – Protocol parameters................................................................................................................................................... 33 
REMOTE TERMINAL...................................................................................................................................................................34 
OPERATING MODES – TEMPERATURE CONTROL (FOLDER PAR/TR)................................................................................35 
Proportional temperature control.................................................................................................................................................................... 35 
Temperature control differential..................................................................................................................................................................... 37 
Digital temperature control............................................................................................................................................................................. 37 
Block heat pump............................................................................................................................................................................................ 37 
Block heat pump based on external temperature and/or parameter............................................................................................................... 38 
Block heat pump from digital input................................................................................................................................................................. 38 
Economy function.......................................................................................................................................................................................... 38 
OPERATING STATES (FOLDER PAR/ST).................................................................................................................................39 
Operating modes........................................................................................................................................................................................... 39 
Operating modes........................................................................................................................................................................................... 39 
Automatic changeover................................................................................................................................................................................... 40 
COMPRESSORS (FOLDER PAR/CP).........................................................................................................................................41 
Type of compressors..................................................................................................................................................................................... 41 
Compressor timings....................................................................................................................................................................................... 41 
Minimum time between the switching on of more than one compressor (CP05)............................................................................................. 41 
For partialized compressors only - Minimum ON step during increase in output (CP08)................................................................................. 42 
Minimum time between the switching off of more than one compressor (CP06)............................................................................................. 42 
For partialized compressors only - Minimum ON step during decrease in output (CP09) ............................................................................... 43 
Minimum time between switching off and on of the same compressor (CP03)............................................................................................... 43 
Minimum time between the switching on of the same compressor (CP04)..................................................................................................... 43 
Minimum compressor ON time....................................................................................................................................................................... 43 
Compressor switch on/off sequence .............................................................................................................................................................. 44 

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INTERNAL CIRCUIT PUMP (FOLDER PAR/PI)..........................................................................................................................45 
Operating modes........................................................................................................................................................................................... 46 
Antifreeze operation with pump...................................................................................................................................................................... 47 
EXTERNAL EXCHANGER FAN (FOLDER PAR/FE)..................................................................................................................48 
Configuration of fan ....................................................................................................................................................................................... 48 
Fan control in defrost..................................................................................................................................................................................... 50 
INTERNAL EXCHANGER ELECTRIC HEATERS (FOLDER PAR/HI)........................................................................................52 
Internal exchanger heaters for antifreeze....................................................................................................................................................... 53 
Internal exchanger heaters in integrated use................................................................................................................................................. 53 
EXTERNAL EXCHANGER ELECTRIC HEATER PARAMETERS (FOLDER PAR/HE) .............................................................55 
AUXILIARY ELECTRIC HEATERS (FOLDER PAR/HA).............................................................................................................56 
DEFROST (FOLDER PAR/DF)....................................................................................................................................................57 
Start defrost................................................................................................................................................................................................... 58 
End defrost.................................................................................................................................................................................................... 59 
Defrost when compressor stops..................................................................................................................................................................... 59 
Manual defrost............................................................................................................................................................................................... 59 
Power failure during defrost........................................................................................................................................................................... 59 
ADAPTIVE (FOLDER PAR/AD)...................................................................................................................................................60 
Operating modes........................................................................................................................................................................................... 60 
Adaptive function with setpoint modification................................................................................................................................................... 60 
Adaptive function with hysteresis modification ............................................................................................................................................... 61 
Adaptive function with setpoint and hysteresis modification ........................................................................................................................... 61 
Setpoint regression........................................................................................................................................................................................ 62 
Protection...................................................................................................................................................................................................... 62 
ANTIFREEZE PARAMETERS WITH HEAT PUMP (FOLDER PAR/AF).....................................................................................63 
POWER LIMITATION (FOLDER PAR/PL)...................................................................................................................................64 
Operating modes........................................................................................................................................................................................... 64 
Power limitation – by high pressure probe (Cool and Heat)............................................................................................................................ 64 
Power limitation – by low pressure probe (Cool and Heat)............................................................................................................................. 65 
Power limitation – by temperature control probe (Cool and Heat)................................................................................................................... 65 
Power limitation – by external temperature (Cool and Heat)........................................................................................................................... 65 
ALARMS AND DIAGNOSTICS (FOLDER PAR/AL) ...................................................................................................................66 
Digital alarms................................................................................................................................................................................................. 67 
Analogue alarms............................................................................................................................................................................................ 68 
Table of Alarms ............................................................................................................................................................................................. 68 
PARAMETERS (PAR)..................................................................................................................................................................73 
Visibility and value of Parameters.................................................................................................................................................................. 73 
CONFIGURATION PARAMETERS (CF).....................................................................................................................................74 
User interface parameters (UI)....................................................................................................................................................................... 77 
Temperature control parameters (tr) – temperature controller........................................................................................................................ 78 
Function mode selection parameters (St)....................................................................................................................................................... 79 
Compressor Parameters (CP)........................................................................................................................................................................ 79 
Internal circuit pump parameters (PI)............................................................................................................................................................. 80 
Recirculation fan parameters (FI)................................................................................................................................................................... 81 
Secondary (external) exchanger fan parameters (FE).................................................................................................................................... 81 
Electric heater parameters (HI)...................................................................................................................................................................... 83 
External exchanger electric heater parameters (HE)...................................................................................................................................... 83 
Auxiliary electric heater parameters (HA)....................................................................................................................................................... 84 
External circuit pump parameters (PE)........................................................................................................................................................... 84 
Boiler parameters (br) -boiler......................................................................................................................................................................... 84 
Defrost parameters (dF)................................................................................................................................................................................. 84 
Dynamic setpoint parameters (dS)................................................................................................................................................................. 85 
Adaptive parameters (Ad).............................................................................................................................................................................. 85 
Antifreeze parameters with heat pump (AF)................................................................................................................................................... 86 
Power limitation parameters (PL)................................................................................................................................................................... 86 
Alarm parameters (AL)................................................................................................................................................................................... 86 
FUNCTIONS (FOLDER FNC) ......................................................................................................................................................88 
Manual defrost activation (folder FnC/dEF).................................................................................................................................................... 89 
Alarm acknowledgment (folder FnC/tA).......................................................................................................................................................... 89 
Change On/OFF state (folder FnC/St)............................................................................................................................................................ 89 
Multi Function Key......................................................................................................................................................................................... 90 
Using the Multi Function Key (folder FnC/CC)................................................................................................................................................ 90 
Download from reset...................................................................................................................................................................................... 91 

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Reset alarm log (folder EUr) .......................................................................................................................................................................... 92 
MECHANICAL ASSEMBLY.........................................................................................................................................................93 
TECHNICAL DATA......................................................................................................................................................................94 
I/O features.................................................................................................................................................................................................... 94 
Mechanical specifications.............................................................................................................................................................................. 95 
Display and LEDS.......................................................................................................................................................................................... 95 
Serials ........................................................................................................................................................................................................... 95 
Transformer................................................................................................................................................................................................... 95 
Mechanical dimensions.................................................................................................................................................................................. 95 
DEVICE OPERATION..................................................................................................................................................................96 
Permitted use ................................................................................................................................................................................................ 96 
Unintended Use............................................................................................................................................................................................. 96 
REGULATIONS............................................................................................................................................................................96 
RESPONSIBILITY AND RESIDUAL RISKS................................................................................................................................96 
NON-LIABILITY CLAUSE............................................................................................................................................................96 

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How to use this manual
This manual is designed to permit quick, easy reference with the following features:
References column:
A column to the left of the text contains references to subjects discussed in the text to help you locate the information you
need quickly and easily.
Cross references:
All words written in italics are referenced in the subject index to help you find the page containing details on this subject;
supposing you read the following text:
” If there are 2 compressors in the installation, the minimum time between the switching on and the switching off) of the two
compressors is observed. ”
The italics mean that you will find a reference to the page on the topic of compressors listed under the item compressors in
the index.
If you are consulting the manual “on-line” (using a computer), words which appear in italics are hyperlinks: just click on a
word in italics with the mouse to go directly to the part of the manual that discusses this topic.
Some segments of text are marked by icons appearing in the references column with the meanings specified below:
Warning! : information which is essential for preventing negative consequences for the system or a hazard to personnel,
instruments, data, etc., and which users MUST read with care.
Take note: information on the topic under discussion which the user ought to keep in mind
Tip: a recommendation which may help the user to understand and make use of the information supplied on the topic under
discussion.
References
Cross references
I
cons for
emphasis

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Introduction
General Description
Uniflair SpA, a leading manufacturer for over a decade of control equipment for small and medium-size air conditioning units is proud to present
UST500, the new range of compact devices with advance functions and groundbreaking applications.
Single-circuit control of centralized air-conditioning systems with 1 or 2 compressors (steps) such as:
•Chillers, Heat Pumps, Close Control:
owater-air;
oair-water;
owater-water;
oair-air;
•Motorized condensers
oair-cooled;
owater-cooled.
Typical applications:
•Minimarkets,
•Industrial plants,
•Offices,
•Hotels,
•Residential buildings.
Technical data:
There are 6 models in the UST 500 range providing up to 5 relay outputs, one TRIAC output, 2
PWM analogue outputs, a 0…10V/4…20mA configurable analogue output and an Open Collector digital output for an external relay. All inputs
and outputs are independent and configurable, meaning they can be adapted to fit any system.
Uniflair SpA's standard 32x74mm format also ensures the utmost flexibility and ease of installation.
Main functions:
•Temperature control via the input or output probe;
•Integrated boiler or heating control;
•Integrated control of two electric heaters or heating system;
•Dynamic set point;
•Automatic changeover;
•Indoor ventilation control;
•Dynamic defrosting;
•Full diagnostics;
•Modulating water pump control;
•Adaptive” function for units with no accumulation;
•Antifreeze function with water pump on external probe;
•Control of non-uniform tandem compressors;
•Power limitation;
•Resources optimized in accordance with the external temperature.
Models and Features
-->See Annexe A - Models and Accessories and the Specifications chapter

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User Interface (folder PAr/UI)
The front panel of the device functions as the user interface and is used to perform all operations relating to the device.
Keys
There are 4 keys on the front panel. Each key has (see the two tables below):
oA “direct” action (indicated on the key)
oAn “associated” function (indicated on the front panel of the device beside the key). In the manual, this is shown in square brackets
(e.g. [UP])
oA “combined” action involving two keys. In the manual, this is shown in square brackets (e.g.[UP+DOWN])
Keys and associated functions
Key Description
Key Press once (press and release)
K
ey
[associated
f
unction]
P
ress and hold
[press for about 3
s
econds]
Menu / Comments
UP
(UP)
•Increases a value
•Goes to the next
label
[Manual defrost
activation] Functions menu see
Functions chapter
(folder FnC)
DOWN
(DOWN)
•Decreases a value
•Goes to the previous
label
[Local ON/OFF]
See
L
ocal On/OFF
section
----
See also Functions
menu
Functions chapter
(folder FnC)
Esc(ape)
Output
(Without saving new
settings)
•Exit without saving
new settings
•Go back to previous
level mode [Change mode]
---
See section on
Changing operating
mode
Operating mode
menu
Set
Confirm
(save new settings)
•Confirms value / exit
and save new
settings
•Move to next level
(open folder,
subfolder, parameter,
value)
•Open State Menu
disp [Main display]
---
See Main Display
section [Main Display Menu]
ALL Alarm acknowledgment See
M
anual alarm
acknowledgment
and reset section
By parameter (see parameters chapter, parameters
U
I10-11-12-13-
14) the function [associated] can be enabled or disabled:
•0 = Key not enabled for the function
•1 = Key enabled for the function
<IMG INF O>
226, 75
117, 6
0
2
99,25
0
-1

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Local On/OFF
Device ‘On’ --> ‘OFF’
Press the [DOWN] key for about 3 seconds from
the main display
The word OFF will appear on the display.
All other LEDs will be off
Device ‘OFF’ --> ‘On’
The word OFF will appear on the display.
Press the [DOWN] key for about 3 seconds
UST500 will return to the “normal” screen
NOTE:
The local ON/OFF function is deactivated if the device has been turned OFF remotely or if a digital input is
configured as a remote ON/OFF.
<IMG INF O>
226, 65
<IMG INF O>
226, 65

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Keys – combined action
S
ymbol
[function
associated to
the combined
pressing of
t
h
e
keys
]
Combination
Keys
C
ombined
pressing
of keys Press
once
(press and
r
elease
[associated function] [Menu] / Comments
[UP
(UP)
+
DOWN
(DOWN)]
[Manual reset]
See Manual alarm
acknowledgment and
reset section
[Esc
+
SETPOINT]
[Open programming
menu]
[Programming menu]
Manual alarm acknowledgment and reset
Alarm messages blink. How to acknowledge an alarm is explained below.
All error messages are shown in the AL folder (see state Menu)
set
esc
set
esc
An error message will be shown, alternating
with the error alert and the main display.
The ALARM LED will be permanently on.

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A
LARM/ERROR ACKNOWLEDGMENT
set
esc
An error can be acknowledged by pressing any
key once.
After pressing any key, the alarm LED will start
to blink.
M
ANUAL RESET
set
esc
To manually reset an alarm, press the “up” and
“down” keys together [UP+DOWN]
- - - - - - - - -
N.B: resetting an active alarm* will save the
alarm in the AL folder (see state Menu).
* i.e. manual reset (alarm)
set
esc
The device will return to the main display.
LEDs and Display
The display has 18 icons (LEDs) split into 3 categories (+ decimal point):
•Decimal point
•States and Operating Modes
•Values and Units of Measure
•Loads
Display
Values of up to 4 figures or 3 figures plus a sign can be displayed.
LED: decimal point
Values are always shown in tenths of a degree/bar.

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<IMG INF O>
LED: States and Operating Modes
L
ED states and
O
perating
Modes
I
con
C
olour
C
olour
P
ermanently
o
n
B
linking
The display shows the
value/resource set for the “main
display”.
In the event of an alarm, it will
alternate with the alarm code Exx.
(when more than one alarm
occurs at the same time, the one
with the lowest number will be
shown first - see Alarms and
Diagnostics chapter)
Alarm Red Active alarm Alarm acknowledged
Heating
Green
Heating mode Antifreeze with heat pump
active
Remote heating mode
(Missing
Icon) Cooling Cooling mode Remote cooling mode
Standby Local standby
mode
(from
keyboard) Remote standby
Defrost Defrost active Manual defrost activated
Economy
Configurable
----
See
Parameters
chapter
----
Ui /dS folder
Parameters
UI07 /dS00
Configurable
----
See Parameters chapter
----
Ui /dS folder
Parameters UI07 /dS00
LED: Values and Units of Measure
L
ED Unit of measure
I
con
C
olour
P
ermanently on
B
linking
Values can be displayed with a decimal point by
setting parameter Ui08 see parameters chapter,
Ui folder)
Clock (RTC) Red Shows current time
(24hr format) Set time
Degrees
centigrade / /
Pressure (Bar) / /
Relative
humidity
(% RH)
Not used Not used
Menu (ABC) Menu navigation /
LED: utilities
L
ED utilities
C
olour
P
ermanently on
B
linking
Amber
Configurable (°)
----
See Parameters
chapter
----
Ui folder
Parameters
UI00..UI07
Configurable (°°)
----
See Parameters
chapter
----
Ui folder
Parameters
UI00..UI07
(°) permanently on: utility active
(°°) blinking:
•example UI00..UI07= 1 (Compressor 1) indicates:
osafety timing
opower limited to 50%
oblock compressor
•example UI00..UI07= 2 (step 2) indicates: safety timing
<IMG INF O>
122, 45
67,9
0
2
0,35
6,3
-1
<IMG INF O>
122, 45
72,95
0
2
-2
5,75
-1

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default configuration
LEDs for utilities are all configurable (see parameters chapter, folder Ui). The factory settings are listed in the table below:
L
ED symbol
on display
LED Default Default icon
on front panel
LED 1
(first from left) Compressor 1
LED 2 Output step 2
LED 3 Internal exchanger electric heater 1
LED 4 Internal exchanger electric heater 2
LED 5 Boiler
LED 6 External exchanger fan
LED 7 Internal circuit water pump
First switch on
set
esc
When UST500 is switched on for the first time, a
lamp test is carried out to check the state and
proper function of lamps.
----------
The Lamp Test lasts for a few seconds. During this
short time, all LEDs and digits flash at the same
time.
set
esc
After the lamp test, based on preselected settings,
the following are displayed:
•time,
•real setpoint
•parameter setpoint
•the value of the analogue input selected
(AI1…AI4) ----------
In the example, the current time is the main display
(RTC)
Access to folders - menu structure
Access to folders is organised into menus.
Access is determined by the keys on the front panel (see relative sections).
Access to each individual menu is explained below (or in the sections indicated).
There are 4 menus:
•‘Main Display’ menu
→ see ‘Main Display Menu’ section;
•‘Operating Mode’ menu
→ see ‘Operating Mode Menu’;
•‘States menu’
→ see "States Menu’ section;
•‘Programming Menu’
→ see ‘Programming Menu’ section.
There are 4 folders/submenus in the Programming Menu:
•Parameters Menu (Par folder)
→ see Parameters chapter
•Functions Menu (Fnc folder)
→ see Functions chapter;
•Password PASS
•Alarm codes EU

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All menus and labels are listed in the table below:
M
ENU
Main Display
Ai AI1 Ai2 AI3 AI4
di Di01 Di02 … Di05
…
rtC HOUr dAtE YEAr
…
Setr
Operating mode HEAtCOOL
StdBY
States
Ai
di
…
CL HOUr dAtE YEAr
…
Hr
C
P01 CO02 PU01 PU02
Programming
M
ENU
Parameters
CF
C
F00…CF78
UI
… … … …
AL AL00…Al48
Functions
dEF
tA
St OFF / On
CC UL dL Fr
EUr
P
assword
E
U

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“Main Display” Menu
‘Main Display’ refers to the contents of the default display, i.e. when keys are not used.
In UST500, the main display can be customized to suit personal requirements. The various contents can be selected from the “disp” menu
which is opened by pressing and holding the [set] key for more than 3 seconds. The main display can be selected from:
•analogue inputs Ai1, Ai2, Ai3, Ai4 (when configured as digital inputs, the display will be defined on the basis of the state and
logical parameter - digital input associations)
•rtC,
•Setpoint
oSetP= set from parameter,
oSetr= real with any decalibration;
Step by step instructions are provided below.
set
esc
To open the [disp] menu to modify the main
display setup, press and hold the set key for at
least 3 seconds.
[set]
set
esc
Opens the blinking menu for the previous
display (rtC, i.e. current time, in this case).
set
esc
To modify the display, use the “up” and “down”
keys to scroll the menu and press the set key to
confirm.
set
esc
On selection of your preferred display, press the
set key to confirm. You will be automatically
returned to the main display set.

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“Operating Mode” menu
Instructions are provided below on how to change the operating mode.
There are three different operating modes:
•Standby mode (StbY)
•Heat mode (HEAT)
•Cool only mode (COOL)
set
esc
For example, let's say you want to change
from StbY to COOL mode
To change operating mode, press and hold
the mode key for at least 2 seconds
PS The main display is set as rtc (current
time)
set
esc
A blinking menu will open containing the
values StbY (standby), HEAt (heat) and
COOL (cool).
set
esc
set
esc
Select your required operating mode and
press the set key.
set
esc
You will be automatically returned to the main
display and you will see that the Stby LED that
was previously on has gone off and the COOL
LED has come on.

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‘States’ menu
From the states menu you can view values for each resource.
For some resources, a "dynamic" view is possible.
•For example, when declared as not present / probe not configured (see System Configuration chapter (folder Par/CF), parameter
CF01=0), analogue input AI2 will not be displayed.
•For example the hours of functioning of compressor 2 - CP02 – not available on single compressor machines.
L
abel
V
isibility
D
escription
C
hange
Ai Ai1 Ai2 Ai3 Ai4 // // Dynamic Analogue inputs //
di di1 di2 di3 di4 di5 // Dynamic
D
igital inputs //
AO AO1 AO2 AO3 // // // Dynamic Analogue outputs //
dO dO1 dO2 dO3 dO4 dO5 dO6 Dynamic
D
igital outputs //
CL HOUr dAtE YEAr Clock YES
AL Er00 …. … … … Er99 Dynamic Alarms //
SP Value // // // // // Setpoint (set) YES
Sr Value // // // // // Real setpoint //
Hr
C
P01
C
P02 PU01 PU02 // // Dynamic Running time
(hoursx10)
compressor/pumps
YES
As you will be able to see from the table, the setpoint SP and time can be modified and viewed:
View Inputs/Outputs (Ai, di, AO, dO)
Press the set key from the main display
Example of view for Analogue Inputs The same
procedure applies for all other I/Os. ***
The label Ai will appear on the display.
(Use the UP and DOWN keys to scroll the other
labels until you find the label required)
Press the set key to view the label for the first
analogue input (Ai01in this case)
Press the set key again to view the value in Ai01.
Note that the °C icon lights up to indicate that the
value shown is in degrees centigrade.
***For digital inputs / analogue outputs configured
as digital (DI), the value will be 0/1 (0 indicates Off,
1 indicates On)
-------------------------------------
Press the esc key to go back to the main display.

UST500 CONTROL BOARD
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Setting the clock (CL)
UST500 has a clock (RTC) to run the alarm log and time bands, just like a programmable chronothermostat. Instructions are provided below on
how to set the time: the same procedure applies to change the date and year.
set
esc
To change the clock on your machine, press the set key
from the main display.
set
esc
Pressing the set key once will open a list of the various
folders.
Use the “UP” and “DOWN” keys to find the CL folder.
Press the set key to open the CL menu.
set
esc
set
esc
On entering this menu, you will see HOUr. Use the “UP” and
“DOWN” keys to select the time, date or year.
Once you have decided what you want to set, press the
[set]** key to open the modification menu for the variable
selected.
**press and hold for about 3 seconds

UST500 CONTROL BOARD
06MC0074@00B0100
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set
esc
set
esc
To set the time, date and year, use the “UP” and “DOWN”
keys to enter the required value.
set
esc
Press the Esc key to exit the set clock menu and go back to
the main display.

UST500 CONTROL BOARD
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14/04/2010
Alarm Display (AL)
Press the set key from the main display
The label Ai will appear on the display. Use the UP
and DOWN keys to scroll the other labels until you
find the AL label
Press the set key to view the label of the first active
alarm (if it exists)
In this case, the first alarm is Er01. Use the UP and
DOWN keys to scroll any other alarms.
-------------------------------------
N.B: the menu is not cyclical.
For example, if the active alarms are ER01, Er02
and Er03, the display will show:
Er01 ->Er02->Er03 <-Er02<-Er01
N.B: -> UP, <-DOWN
Press the esc key to go back to the main display.
Example of how to set the setpoint (SP)
By way of example, we will change the setpoint value in COOL mode by 12.0 degrees centigrade to12.5 degrees centigrade.
set
esc
To change the setpoint on your machine, press the set key
from the main display.
set
esc
Pressing the set key once will open a list of the various
folders. Use the “UP” and “DOWN” keys to scroll the menu
and find the SP folder.