M thermal Mono
96 202005
Midea M thermal Mono Engineering Data Book
7.14.3 AIR PURGE operation
MENU > FOR SERVICEMAN > TEST RUN > AIR PURGE
Once installation is complete it is important to run the air purge function to remove any air which may be present in the water
piping and which could cause malfunctions during operation.
The AIR PURGE operation is used to remove air from the water piping. Before running
AIR PURGE mode, make sure that the air purge valve is open. When the air purge
operation starts, SV1 valve opens and SV2 valve closes. 60 secs later the pump in the
unit (PUMPI) operates for 10min during which the flow switch does not work. After
the pump stops, SV1 valve closes and SV2 valve opens. 60 secs later both PUMPI and
PUMPO operate until the next command is received. If any error code is displayed
during the air purge operation, the cause should be investigated. Refer to Part 3, 10
“Error Code table”.
7.14.4 CIRCULATION PUMP RUNNING operation
MENU > FOR SERVICEMAN > TEST RUN > CIRCULATION PUMP RUNNING
The CIRCULATION PUMP RUNNING operation is used to check the
operation of the circulation pump. When the circulation pump running
operation starts, all running components stop. 60 secs later, the 3-way
valve opens and the 3-way valve closes. After a further 60 secs PUMPI
starts. 30 seconds later, if the flow switch detects that the water flow is
normal, PUMPI operates for 3 mins. After the pump stops 60s, the 3-way
valve closes and the 3-way valve opens. 60s later both PUMI and PUMPO
will operate. After a further 2 mins the flow switch start to check the water flow. If the water flow rate is sufficient, both
PUMPI and PUMPO operate until the next command is received. If the water flow rate is insufficient over any 15-second
period, PUMPI and PUMPO stop and error code E8 is displayed. Refer to Part 3, 10 “Error Code table”.
7.14.5 COOL MODE RUNNING operation
MENU > FOR SERVICEMAN > TEST RUN > COOL MODE RUNNING
The COOL MODE RUNNING operation is used to check the operation of the
system in space cooling mode.
During the COOL MODE RUNNING operation, the M thermal Mono unit leaving
water set temperature is 7°C. The current actual leaving water temperature is
displayed on the user interface. The unit operates until the leaving water
temperature drops to the set temperature or the next command is received.
If any error code is displayed during the cool mode running operation, the cause should be investigated. Refer to Part 3, 10
“Error Code table”.
Figure 3-7.35: AIR PURGE operation
Figure 3-7.36: CIRCULATION PUMP RUNNING display
Figure 3-7.37: COOL MODE RUNNING display
11 TEST RUN
Test run is on.
Air purge is on.
OK CONFIRM
11 TEST RUN
Test run is on.
Circulation pump is on.
OK CONFIRM
11 TEST RUN
Test run is on.
Cool mode is on.
Leaving water temperature is
15°C.
OK CONFIRM
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