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Operating Instructions - ET 21 & 25
Click www.andrews-sykes.com or Call Us Free 0800 211 611
Control Panel Functions
1. Power: Use to power On / Off/.
2. ▲▼: Raises or lowers temperature and / or sleep (off) time.
3. Cool: Use to select cooling mode.
4. Lower Mode: Controls fan low speed.
5. High Mode: Controls fan high speed.
6. Off Timer: To set the length of time, once turned on, that you wish the cooler to
run for. You can set 0~24 hours. Time intervals are 30mins. up to 10 hours and
then 1 hour between 10 and 24 hours.
7. Remote: From the long distance, you can control the machine by wired remote
control.
8. Room: If the LED in ON, the displayed temperature is for room temperature. If
the LED if OFF, the displayed temperature is for spot temperature.
9. Comp: When the compressor is operating, the LED in ON.
10. Error: Error signal (E1: High pressure, E2: Low pressure, E3: Sensor, AF: Eva
freezing)
11. Water Full: Red light indicates ‘Tank Full’. The compressor will shut off
automatically. Empty tank and replace in position to resume operation. Fig. 2
12. Align Drain Tank: The red light indicates the water tank is not in the correct
position.
13. Display: Display Room / Spot temperature, and the setting temp and sleep
time in case of setting them. When the user set the sleep timer ‘hr’ will be
turned on. (Display of ‘LO’: under the 0ºC, display of ‘HI’: over the 50ºC)
START BY PRESSING THE ‘POWER’ BUTTON.
• Cooler will start up automatically
• To STOP the unit, press the ‘POWER’ button once again
To change fan speed, press the ‘LOW’ button.
If you wish to operate on fan only, press the ‘COOL’ button. To resume
cooling, press the ‘COOL’ button again. (NOTE: There is a 3 minute delay
when switching functions to protect the compressor)
To reduce the temperature of the entire room then select ‘Room / Area
cooling’. For targeted cooling of machinery, servers, or people etc, select
‘spot cooling’.
If you want to display room temperature, push cool and button
simultaneously for three seconds.
If you want to switch from centigrade to fahrenheit - push (up) and (down)
button simultaneously for three seconds.
Control Panel Functions
When the power is on, the best set temperature is displayed. Default of set
temperature is 5ºC.
When you push either (up) or (down) button, the setting temperature
can be changed.
The display showing the set temperature will blink 3 times.
Limits of Room / Spot and setting temperature:
Room / spot temperature Setting temperature
0ºC - 5ºC 1ºC - 30ºC
Cooling operates when room / spot temperature is more than set temperature
Cooling stops when room / spot temperature is less than set temperature
Setting the timer
When cooler is operating, press the ‘OFF TIMER’ button and set the length
of time you want by pressing or . Each time you press the button you
will increase the 'time to off' period by 30 minutes up to 10 hours, and 1 hour
thereafter up to 24 hours. The display will show .5 for 30 minutes and 1 for
an hour. e.g. 1 ½ hours will be shown as 1.5.
When you have finished setting the time period, the 'off timer' lamp will
illuminate, which indicates the cooler is in sleep (off timer) mode.
If you press the 'OFF TIMER' button during its operation, the remaining time
will be shown.
to CANCEL timing, press the 'OFF TIMER' button for ONE second, it will
then switch the timer off automatically.
Errors and Warnings
WATER FULL - Display shows FU
When the water container is full, FU is displayed and the LED 'Water full'
illuminate.
ALIGN WATER TANK -
If the water tank is not positioned correctly, the LED 'Align Drain Tank'
illuminate
HIGH PRESSURE -
'E1' is displayed and the 'Error' LED will be on when the pressure of the
compressor is too high and the high pressure switch is open.
LOW PRESSURE -
'E2' is displayed and the 'Error' LED will be on when the pressure of the
compressor is too low.
SENSOR PRESSURE -
If the thermistor is short circuited or cut, 'E3' is displayed and the 'error' LED
will be on
ANTI FREEZING -
When the temperature of the evaporator is below -4ºC, 'AF' is displayed and
the 'Error' LED will be on.
FLEXIBLE DUCT OUTLET (COLD AIR)
HANDLE
DIGITAL CONTROLLER
CONDENSER OUTLET (HOT AIR)
EVAPORATOR FILTER
AMBIENT AIR INTAKE.
CONDENSER FILTER
CASTERS (FRONT LOCKABLE)
ELECTRIC PANEL
(ACCESS BY AUTHORISED SERVICE
PERSONNEL ONLY)
POWER PLUG
WATER LEVEL INDICATOR
TO CHECK WATER LEVEL OF THE
CONDENSATE TANK.
CONDENSED WATER TANK
TO COLLECT WATER GENERATED
DURING COOLING.
Errors and Warnings
Front View
Rear View
2


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