Midea MHC-V16W/D2RN8-B - Page 56

M thermal Mono
54 200204
Midea M thermal Mono Service Manual
Procedure
E0 / E8
Water flow switch connection on
hydronic system main PCB is loose
1
Yes
Ensure the switch is connected properly
No
Water flow is insufficient
2
Yes
Check the water piping and valves. Make
sure the water piping is clean, there is no
air in the water piping and all valves are
open. If the internal circulator pump is
not already set to the highest speed,
increase its speed.
No
Water flow switch is damaged
Yes
Replace the water flow switch
No
Internal circulator pump fuse, backup
electric heater fuse or hydronic system
main PCB fuse has blown
3
Yes
Replace the blown fuse
No
Replace hydronic system main PCB
Notes:
1. Water flow switch connection is port CN8 on the main PCB for hydronic system (labeled 5 in Figure 4-2.1 in Part 4, 2.2 “Main PCB for Hydronic System”).
2. Check water pressure on the manometer. If the water pressure is not > 1 bar, water flow is insufficient. Refer to Figure 2-1.2 and 2-1.6 in Part 2, 1 “Layout
of Functional Components”.
3. The fuse is labeled 25 in Figure 4-2.1 in Part 4, 2.2 “Main PCB for Hydronic System”.
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