Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM-201409
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In the process of trial run, please check the following items:
口
Check whether the switch of the wired controller is normal.
口
Check whether the functional keys of the controller are normal.
口
Check whether the indicators illuminate normally.
口
Check whether the manual operation buttons are normal.
口
Check whether the water heating operation is normal.
口
Check whether the outlet water temperature is normal.
口
Check for excessively noise during operation.
口
Check whether refrigerant leakage.
6. Fault analysis and solutions
Normal operation
Phenomena
Cause
White aerosol or globule is given
out.
Air supply motor stops automatically to defrost.
Make sound of
‘hiss’ every now
and then.
At the beginning and the end of the defrost process, sound
is given out in motor valve.
During the process or just after having stopped, sound like
water flow occur, which will be amplified at the first 2~3
minutes, this is caused by process of refrigerant current or
water.
Slight
‘hiss’ is caused by heat exchanger as temperature
changes. The sound gives out because of heat expand and
cold contracts of heat exchanger.
Please check that again
Phenomena
Cause
Stop operation or start up
automatically.
Check the timer whether it is correctly set.
Detect anti-freezing mode is operating.
No operate
Whether the power supply is cut.
Whether the manual power supply switch is off.
Whether fuse is broken.
Whether the protection device works. (Operation lamp is
lightened.)
Whether it is the time set. (Operation lamp is lightened.)
Inefficient heating
Whether the inlet and outlet of heat pump units is blocked.