Winston WSW1-80L-WM, Руководство по эксплуатации и установке

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8. Maintenance & Repair
3.
The non-fault phenomena
1 Why the compressor is not running when I start the unit?
Answer When the unit is on after stopping, the unit will not run until 3 minutes later. It is the
self-protection of unit. When the ambient temperature is lower than 2°C, the compressor will stop and
the electric heater will be on.
2 Why the unit does not stop when the water outlet temperature on the display reaches the
set point
Answer Because there are two sensors, upper sensor and bottom sensor, in the unit. The water
outlet temperature on the display is only from the upper sensor. The bottom water
temperature in the tank will decrease when you use some water, although the upper water in the
tank has the set point temperature. The unit will not produce heat until the bottom sensor senses
the set point.
3 Why the water outlet temperature on the display creases slowly?
Answer Because the water temperature is different between the upper layer and under layer
in the tank at the beginning. When whole the water in the tank have the same temperature, it
will rise faster.
4 Why the water outlet temperature on the display decreases when the unit is heating
Answer If the upper water temperature is much higher than that of the bottom water, then the water
temperature will decrease a little because of the convection between hot water and cold water in the
tank.
5 Why the unit does not start up to heat when the water outlet temperature decreases
Answer: The water temperature will decrease because of the heat loss if the hot water in the tank is
not used for a long time. In order to avoid the continual ON/OFF, the unit does not start up until the
water temperature decrease more than 5°C.
6 Why the water temperature decrease a lot abruptly?
Answer: The temperatures of hot water and cold water in the tank are different. The cold water may
go to the upper sensor when the hot water have been used up.
7 Why the hot water is still available when the water out temperature on the display
decreases
a lot
Answer: Because the upper sensor is positioned near the top of the tank, there is still 1/5 of hot
water available when the water outlet temperature on the display decreases a lot.
8 Why the compressor stops but the fan keeps running when the unit is in the heating mode?
Answer: The unit needs to defrost when the evaporator freezes because of the low ambient
temperature. The compressor will stop and the fan keeps running when the unit defrosts.
9 Why the heating time is so long, more than 10 hours?
Answer: Energy saving, small power and long heating time are the distinguishing features of the
units. Normally, the heating time is 4~15 hours due to the water inlet temperature, water
consumption and ambient temperature.