Mitsubishi Electric QAHV-N136TAU-HPB Manual De Instrucciones/Instalación página 38

(2)Water flow rate adjustment operation (when the secondary side control is disabled)
Step Contents
a Water level check
b Power operation
Operation
c
procedure
Operation
d
procedure
e Stop operation 1
f Stop operation 2
Checking the flow rate after the flow rate adjustment operation
The flow rate adjustment operation adjusts the pump output and water flow rate valve opening to determine how to
match the flow rate characteristic to the local circuit. Use the method below (*3 1 to 4) to check the operation
result (characteristic).
If air bleeding was not done fully and the map not created properly, a water shutoff error, high pressure
error or other problems will occur when operating the system. Check the points below in this case. If the
values are abnormal, redo the air bleeding and flow rate adjustment operations.
(*3)
1Set the PCB's DIP switches as shown below.
SW2
-10 -5 -6
OFF OFF OFF
2Press SWP3 repeatedly to change the code shown in the PCB's display. The code changes with each
press (*4).
Continue pressing SWP3 until 'dxx' is displayed in the PCB's digital display.
('dxx' is a code that stores the flow rate for a given pump output opening and valve opening. See Table 1.)
(*4) If the flow rate adjustment operation has never been performed, 'ng' appears after the system startup
operation. Perform the flow rate adjustment operation in this case.
Operation and check points
Check the water level is the full level.
Turn the power ON.
Change the setting of PCB slide SWS1 from
REMOTE to LOCAL.
Change the setting of SW1-6 from OFF to ON.
Change the setting of SW1-6 from ON to OFF.
Change the setting of PCB slide SWS1 from
LOCAL to REMOTE.
SW3
-7 -8 -9 -10
OFF OFF ON ON
If this flow rate adjustment operation has never
been performed '--ng' is displayed.
* Make sure SWS2 is set to the lower side. (See
page 25.)
* Step c and Step d must be taken in sequence to
run the flow-adjustment operation.
* The pump operation and flow rate adjustment
valve opening are automatically adjusted, and
the flow rate is measured in 30-second intervals.
* You can check whether this flow rate adjustment
operation has ended or is underway using the
setting given in Note 1.
GB-38
Supplemental explanation
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