MCAC-HTSM-201409 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual
36
Disoperation occurs during unit working:
In case disoperation caused by lighting or vehicle radio, cut off the manual power
switch, and turn it on again, afterward press RUN/STOP key.
It is forbidden to switch the power off if ambient temperature below -7°C. In case of
power failure or power need be cut because of maintenance, please open the drainage
valves at the joints of water inlet and outlet pipes as soon as possible to draining out all
water. Otherwise, components inside of the units may be damaged by freeze. Upon
draining water, please close the water drainage valves.
About RCCB
The unit must use RCCB, please install an RCCB between in user power supply and the
unit. In case the unit cannot act but not attribute to power failure, please check these RCCB
switches at first. Before operate the RCCB, please ensure that the user installing switch is
break off.
After the RCCB has serviced for a period of time (Generally once a month), it is necessary
to press the test button at close circuit to check whether the performance of RCCB is work
normally (Every time press this button, RCCB would break-off once at a time). In case
malfunction occurs, but no causes were found, it is permit to delivering power, you must
check out the cause by feature test if necessary. If which detected and confirmed as its
self-malfunction, please consigning a professional personnel to replace a new one or repair
it immediately.
About shut-off memory
Every time when power is shut off, controller will save the current operate status automatically.
When power comes on the next time, controller would deliver ON/OFF signal to the unit
according to its memory before power failure. This function keeps unit always working on the
mode which was set in the last time before power failure.
About upkeep and maintenance
Before leave the unit idle for a long period, please make sure the followings:
Vacuum air completely inside the heat exchanger and water at pipelines, and turn off all
valves.
Check and clean the internal components of the unit at a regular base.