Steca UGP 5.9 Manuale utente
Failure analysis
PF166
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The PF166 is running with extra low voltage. There is no risk during maintenance and testing
by high voltage. Nevertheless use isolated tools and a fuse in the battery cable to protect a
short circuit of the battery. Please prevent as well ESD.
1. Check installation
Please check if the display shows any number or if the Minus-LED is
blinking [40]. If no display appears check battery connection:
•polarity
•broken fuse
•damaged cable or connector
2. Battery voltage
Please check if the battery voltage is higher than the cut-off voltage of the compressor. If
the battery voltage is below 10,4V or in between 1 ,0V and 22,8V the inverter box [235] is
disconnecting the compressor to protect the battery against deep discharge. So voltage had
to be between 10,4V and 1 ,0V in a 12V system or between 22,8V and 30,5V in a 24V
system.
The display [90] is already operating if the compressor [230] is disconnected by the inverter
box [235]. If the battery voltage is lower than the cut-of level, the LED connected to the
inverter box (between "+" and "D", see topic 5) is flashing one time.
After recharging the battery the compressor [230] will start automatically after reaching the
cut-in voltage.
Cut-off Cut-in
12V battery 10,4V 11, V
24V battery 22,8V 24,2
°C
°C
°F
°F
electronic
thermostat with
user interface
GTC
inverterbox with
speed control
101N0300
Failure analysis
PF166
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3. Access to inverter and compressor
To open the ventilation grille [500] on the right
side you had first to remove the plastic cover
[520] from the screws [510].
After removing the cover [520] you can
unscrew with TORX T10 the grille [500]
After removing the grille [500] you have access
to the compressor [230] and inverter box [235]
"+" blue Bat+
− brown Bat−
+ brown Thermostat+
C blue Thermostat−
T
black
Thermostat
Failure analysis
PF166
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4. Check inverter box (beside the compressor) [235]
The signal to start the compressor [230] will be activated by a short circuit between "C" and
"T". There is no risk of high voltage, sparks or high current. You can use even a not isolated
cable. If the thermostat-display-electronic [40] failed the compressor [230] could be started
manually by a short circuit between "C" and "T" of the inverter box [235]
Before short circuiting the terminal "C" and "T" to start the compressor [230] manually please
disconnect all connectors coming from the display-electronic [40]. First brown "+" cable
above "F" than the black "T" and blue "C" cable. If the inverter box [235] is connected to the
battery and if the battery voltage is higher than the cut-off voltage the compressor [230]
must start suddenly after disconnecting "C" and "T".
If the compressor [230] do not start the inverter or the compressor [230] could be damaged
Display
Electronik
Sensor
Compressor
5. Compressor [230]
If you connect an LED to the "+" terminal above "F"
and to the "D" terminal (see picture 2) you could
have a feedback if the inverter box [235] is
operating and some other events are responsible
why the compressor [230] don't starts. See table.
Compressor
6. Electronic thermostat with user interface (display and key board) [40]
If the display [40] monitors no number or if the Minus-LED is not blinking please disconnect
the blue cable "C" on the inverter box [235] as well as the other blue cable "-" and connect
them together. If the display [40] will not show any characters or blinking Minus-LED the
inverter box [235] is damage.
Failure analysis
PF166
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Display
Electronik
Sensor
Compressor
Failed Component Compressor [230] Display-Electronic [40]
Integrated in opener
LED between "+" and "D"
Connected to inverter box
Battery connector
or fuse
or broken battery cable
Is not running Not running
No blinking Minus LED
No display
Off
Compressor If the compressor doesn't start
after short circuiting "C" and "T"
the display-electronic is not
responsible for the failure
Blinking LED or displaying
character
5 thermal cut out
4 motor speed error
3 motor start error
Inverter box Compressor is not running Display could be out of order 5 thermal cut out
Inverter box Compressor is not running Electronic is connected direct
to battery by connecting "C"
and "-" together and display is
monitoring anything
Off because inverter is not
supplied with energy
Electronic Compressor is off
or runs continuously
No display even after testing
step 6
Sensor Running in safety operation Display "F4"
. De-installation inverter box [235]
If you identify that the inverter box [235] is damaged you can uninstall the box. Therefore
please disconnect all cables and open the screw.
Than you can remove the inverter and disconnect the connector from the compressor
8. De-installation of display electronic [40]
First you had to open the 3 screws [60] at the bottom of the opener. TORX T15
unplug cables
and open
screw
unplug
connector
cables leaves
to top
Failure analysis
PF166
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Than you can open the top [50] of the opener to get access to the display-electronic [40]
Disconnect the connectors of the temperature sensor on the right side and the connector
on the left side and clip out the display electronic [40]
If necessary you can unscrew all 3 screws [20] of the bottom opener [10] with TORX T25
