Gree A Series Service Manual page 107

A Series Modular-type Air-cooled (Heat Pump) Chiller
at the outlet and inlet pipes. Also, adjust the flow control valves or shutoff valves to make the
flow meet application requirements.
When the environmental temperature is available, let the unit perform cooling (>15℃).
When the unit has run stably for 10 minutes, the normal difference of the entering and leaving
water should be 4-6℃.
(1)If the temperature difference is larger than 4-6℃, raise it by reducing the water flow of oth-
er units.
(2)If the temperature difference is smaller than 4-6℃, ignore it in the event that the differ-
ence of other units is suitable, and reduce the water flow of this unit in the event that the
difference of other units is also unsuitable.
(3)Check for the water flow of other units one by one in the same way.
6.4.1.4 Check for Operation of the Whole Unit
(1)Check the difference of the entering and leaving water temperature of each unit when the
whole unit has been in operation. If temperature adjustment fails, reconsider the capacity
of the selected water pump.
(2)Start up the whole unit under the full load. When the whole unit has run stably for one
hour, check if the water temperature and the air conditioning effect meet the user's
requirements.
(3)Observe and record the entering and leaving water temperature, condensing and evapo-
rating pressure. Then, stop the unit and check the set point of each parameter on the con-
trol panel. After that, complete the commissioning date sheet.
(4)When the unit goes into the protection state, figure out causes as well as solutions.
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