LAUDA Water Circulation coolers
WK, WKL
YAWE0019/18.12.01
- 21 -
Press the key
for 10 sec, LED at the top left flashes, C1 appears on the display. Repeated pressing
switches through from C1 to C10 (switching point). After approx. 2 sec the actual value is shown
and can be altered by means of the keys
and
. Altered resp. new values must be confirmed
with
. With C11 the alarm delay time can be chosen between 0 and 999 minutes. After 10 sec the
controller always returns to the display mode. After that lock the configuration level with POF (see above).
Also refer to section 3.
9.
Maintenance
9.1
Maintenance of the refrigeration unit
The refrigeration unit operates largely maintenance-free. If the unit is being operated in a dusty atmosphere
the condenser of the refrigerator has to be cleaned at intervals of 4 to 6 months or more frequently. This is
best done by blowing compressed air or nitrogen into the ventilation openings for a few minutes. It may be
useful to unscrew the front grille.
Transportation and storage
Caution!: In case of frost danger (e.g.: Transportation in the winter) empty the condenser of water-cooled
devices! For this purpose heat up the bath to 20°C. Loosen the hose at the water tap. Adjust the setpoint to
0°C and blow compressed air into the water inlet tubing (from behind: on the left) immediately after start of
the compressor.
Put the outlet tubing maximally low so that the device is completely emptied. Switch off the device
immediately again.
9.2
Trouble-shooting and safety notes
For all other maintenance operation and repairs always pull out the mains plug! Repairs on the control unit
(with the side panel or cover removed) must only be carried out by a qualified electrician.
The control circuit of single-phase units is protected by a 5 x 20 fuse. 3-phase units have in addition a
Neozed control fuse and 3 Neozed compressor fuses.
This information only refers to units of mains supply 230 V; 50 Hz or 230/400 V; 3/N/PE 50 Hz. Fuse values
for other units are to be seen on the circuit diagram or the components list.
The fuses in the control circuit are accessible after removing the right-hand side panel
Control fuse 5 x 20 F 0,2 A
Ref-No.
EEF 002
1x on each model
Control fuse Neozed 6A
Ref-No.
EES 052
1 off on WK 3200, WK 4600, WKL 3200, WKL 4600
Compressor fuse Neozed 6A
Ref-No.
EES 052
3 off on WK 3200, WK 4600, WKL 3200, WKL 4600
In case of pump troubles on units with three-phase alternating current (WKL7000...WKL 10000 W) test
whether the motor safety switch has released. The safety switch can be restored after removing of the right
sidewall.
The immersion pump can readily be removed after taking off the side parts and cover. We therefore
recommend that the pump alone is returned in case of a fault (not on WK 230).
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