Mitsubishi Heavy Industries FDT28KXE6A Service Manual page 25

(11) Test run
(a) This control can be performed from the master unit, not from the slave unit.
If this control is done from the slave unit, the following display is shown on the 7-segement display.
The display returns to normal display if the test run control switch is reset.
Code indicator
OPE
(b) Test run from master outdoor units with dip switches SW5-1 and SW5-2.
SW5-1
Take note that this operation has priority over other optional devices such as center console and etc.
This operation status is transmitted to the optional devices.
(Note) Test run operation by external input is also available with following method. (Refer next page for detail)
• Select the external input terminal (CnS1) and set 7-segment [P11]-[6] for the function of SW5-1, and select the external input terminal (CnS2) and
set 7-segment [P12]-[7] for the function of SW5-2.
Shorted
CnS1
Open
• Other combination of external input terminals (CnS1, CnS2, CnG1, CnG2) and of setting function with 7-segment ([P11], [P12], [P13], [P14] and
-[6], -[7]) are avilable to use.
(c) Starting conditions of test run operation
(i) Dip switch SW5-1 is turned ON. However the input before the power ON is invalid.
(ii) The dip switches SW3 and SW5, other than SW5-1and SW5-2, should be turned OFF.
However, regarding the dip switch SW3-2 for automatic backup operation, it is invalid during test run operation
regardless whether SW3-2 is turned ON (valid) or OFF (invalid).→In order to check trouble during test run operation.
(d) Control during test run (If indoor units are normal)
(i) Heating operation is performed with SW5-2 OFF, while cooling operation is performed with SW5-2 ON.
(ii) Indoor EEV control at the end of test run is depended on the specifications of the indoor unit.
(iii) Cooling operation: Compressor frequency control is depended on the cooling low pressure control.
(iv) Heating operation: Compressor frequency control is depended on the heating high pressure control.
(e) Ending conditions of test run operation
Test run operation is terminated if one of following conditions is satisfied.
(i) Test run operation ends when the dip switch SW5-1 is turned OFF.
(ii) When the operation is stopped by the error control during test run, the error is displayed same as the normal operation
and the state of error stop is retained even if SW5-1 is turned OFF.
Data indicator Contents of invalid operation
10
ON SW5-2
Normally operation and after test operation
OFF
Open
CnS2
Shorted
Normal operation and after test operation
Delete
Slave setting is invalid.
OFF Test run for heating
Test run for cooling
ON
Test run for heating
Test run for cooling
- -
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