User manual

Industrial Air Division
132920 1163 04
1.4.2.1 General alarm LED (3-Fig. 7a) 1)
- The LED blinks in case of a shut-down (due to either too high a
compressor element outlet temperature or overload of the
compressor motor or fan motor) 2); at the same time the shut-
down screen appears. After eliminating the cause of the
trouble and when the abnormal condition has disappeared,
press key Rset (5).
- The LED blinks and the compressor is shut down if the sensor
of the compressor element (TT11-Fig. 2b) is out of order; at the
same time the display will show a fault message. Switch off the
voltage, depressurize and check the sensor and its wiring.
- The LED is alight in case of a shut-down warning; at the same
time a warning message appears. Remedy; see section 5.
- The LED is alight if the dewpoint sensor (TT90) is out of order
(on Full-feature compressors); at the same time a fault
message is shown. Stop the compressor, switch off the
voltage, depressurize and check the sensor and its wiring.
1.4.2.2 Selecting a menu
To facilitate controlling the compressor, menu-driven programs are
implemented in the electronic module. Use the function keys (5) to
select the menus in order to program and monitor the compressor.
The "User manual for electronic regulator for GA30-GA37-GA45
compressors" deals elaborately with all regulator functions.
1.4.2.3 Function keys
Abbre- Designa- Function
viation tion
Add Add To add compressor start/stop commands
(day/hour)
Canc Cancel To cancel a programmed setting when
programming parameters
Del Delete To delete compressor start/stop commands
Lim Limits To show limits for a programmable setting
List List To list programmed start/stop commands
(day/hour)
Load Load To load the compressor manually
Main Main To return from a menu to the main display
(Fig. 7b)
Menu Menu Starting from the main display (Fig. 7b), to
initiate the main menu (Fig. 7c) which gives
access to submenus
Starting from a submenu, to return to the
main menu (Fig. 7c)
Mod Modify To modify programmable settings
More More To have a quick look at the compressor
status
Abbre- Designa- Function
viation tion
Prog Program To program modified settings
Rset Reset To reset a timer or message
Rtrn Return To return to a previously shown option or
menu
Slct Select To select a submenu or to read more details
of a selection shown on display
Unld Unload To unload the compressor manually
1.5 Electric cabinet (Fig. 5)
The cabinet comprises electric components such as relays,
transformers and fuses as well as the start contactors for the
compressor motor and fan motor 1). An overload relay for the
compressor motor (F21) and a fan motor circuit breaker (Q15) are
provided.
A phase control relay (K25) 2) is installed to monitor the
connection to the mains. The relay has two LEDs. The green LED
is alight if the voltage is switched on. If the connection of the
incoming electric lines is correct, the yellow LED of the relay will be
alight and the compressor will start after pressing button (8-Fig.
7a). In the other case, the yellow LED will be out and the
compressor will not start: switch off the voltage and reverse two of
the incoming lines of terminal strip (1X2).
On air-cooled compressors: if it should be necessary to change the
rotation direction of the fan motor (M2-Figs. 2) only, switch off the
voltage and reverse two connections at the terminals of circuit
breaker (Q15).
On GA Full-feature, the voltage supply to the dryer must be 220-
240 V single-phase. The voltage to the dryer is supplied over the
contacts of relay (K11), which close when the compressor is
started. Consult section 7.4.
1.6 Air dryer on GA Full-feature (Figs. 4a and 9)
GA Full-feature are provided with a dryer which removes moisture
from the compressed air. Depending on the compressor type,
following types of air dryers may be provided: ID80, ID100 or
ID120. The type is stamped on the data plate (13-Fig. 9).
1.6.1 Compressed air circuit
Compressed air enters heat exchanger (5) and is cooled by the
outgoing, cold, dried air. Water and oil in the incoming air start to
condense. The air then flows through heat exchanger (6) where
the refrigerant evaporates and withdraws heat from the air. This
1) Consult the User manual for the electronic regulator, section
"Status data submenu".
2) Air-cooled compressors only.
1) Air-cooled compressors only.
2) Not installed on later production compressors. In this case, the
phase control is carried out by the electronic regulator