ES AWH11-V5+, User Manual

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4. Maintenance
4.1 Attention
1) The user mustn't change the structure or wiring inside the unit.
2) The service and maintenance should be performed by qualified and well-trained technician. When the
unit fails to run, please cut off power supply immediately.
3) The smart control system can automatically analyze various protection problems during daily use, and
display the failure code on the controller. The unit may recover by itself. Under normal operation, the
piping inside the unit don't need any maintenance.
4) In normal ambient conditions, the user only needs to clean the surface of the outdoor heat exchanger
per month or quarter of a year.
5) If the unit runs in a dirty or oily environment, please clean the outdoor heat exchanger by professionals,
using specified detergent, to ensure the performance and efficiency of the unit.
6) Please pay attention to the ambient environment, to check if the unit is installed firmly, or
the
air inlet and outlet of the outdoor unit is blocked.
7) Unless the water pump is damaged,
or maintenance should be taken to the water
system inside the unit. It's recommended to clean water filter regularly or change it when it's very dirty
or blocked.
8) If the unit
in winter for a long time, please drain all the water inside the system, to
prevent the water pipes from damage due to freezing.
whether
no special service
will not be used
4.2 Cleaning of water filter
The water filter should be cleaned according to the manual of water filter, to ensure the water flow of the
water system. It is recommended that it be cleaned once in the first month, and then, once half a year.
4.3 Cleaning of plate heat exchanger
Thanks to the normally very high degree of turbulence in the heat exchanger, there is a self-cleaning effect
in the channels. However, in some applications the fouling tendency can be very high, e.g. when using
extremely hard water at high temperatures. In such cases it is always possible to clean the exchanger by
circulating a cleaning liquid (CIP-Cleaning In Place). Use a tank with weak acid, 5% phosphoric acid or,
if the exchanger is frequently cleaned, 5% oxalic acid. Pump the cleaning liquid through the exchanger.
This work should be done by qualified person. For further information, please contact your supplier.
4.4 Gas charging
The refrigerant plays an important role in delivering energy in cooling or heating. Insufficient refrigerant
affects directly efficiency of cooling and heating. Please pay attention to the following before adding
refrigerant:
The work should be done by professionals.
If the system has not enough refrigerant inside, please check whether the system has leakage inside.
If yes, please repair it before gas charging, otherwise unit will lack of refrigerant again after working
for a short period.
Don't add too much refrigerant than required, or it may cause a lot of failures, such as high pressure
and low efficiency.
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