•
When the self-protection state is active, a buzzer will sound every other minute, the ALARM indicator will flash,
and the display indicates an error code and the water temperature alternatively. Press CANCEL for 3 seconds
to stop the alarm. When the protection cause is resolved the error code disappears on the display, the buzzer
sound stops, and the unit returns to normal operation.
•
Examples of problems that can trigger the self-protection function:
•
o
The air inlet or outlet is blocked
o
The evaporator is covered with too much dust.
o
Incorrect power supply (exceeding the range of 220-240V AC)
•
If the unit does not start automatically after the problem has been resolved, the user can reset the self-protec-
tive function by shutting down the power supply manually and then restart the system again.
11.4.6 Water temperature display
•
The temperature on the display is only showing the water temperature in the upper part of the water tank
(over 1/4), that is, the water you will be using.
•
The 6 LED indicators beside the water temperature on the display indicate the level of the water temperature
in the lower part of the tank. When the temperature reaches 40°C, the blue one is lit; when it reaches 50°C, the
blue and yellow ones are lit; when it reaches 60°C, the blue, yellow, and red ones are lit.
•
When hot water is tapped, the temperature in the lower part of the tank may decrease while the upper part
still keeps a high temperature. The system will then start heating the lower part in the tank. This is normal
behaviour.
11.4.7 Trouble shooting
•
If errors occur, the system enters a standby mode. It could still work, but not so efficiently as normal. Contact
service technician for corrective actions.
•
If a critical error occurs, the system will not work at all. Contact service technician for corrective actions.
•
If an error occurs, the buzzer will sound every other minute, a warning light will be flashing, the display will
show the error code and water temperature alternatively. To stop the alarm, press the CANCEL key for 3 sec-
onds. Contact service technician for corrective actions
11.4.8 Heat up time
Figure 17. Heat-up time from 15 °C water starting temperature
Position Explanation
1 Time (h)
2 Ambient temperature (°C)
Installation, Service and User Manual VMGFK202 – 31
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