Mitsubishi Electric Mr. SLIM SEZ-M25DA Manuel D'installation page 18

9. Test run
Step 2 Switch the remote controller to "Test run".
① Select "Test run" from the Service menu, and press the [SELECT] button. [Fig. 9-2-1] (P.8)
② Select "Test run" from the Test run menu, and press the [SELECT] button. [Fig. 9-2-2] (P.8)
③ The test run operation starts, and the Test run operation screen is displayed.
Step 3 Perform the test run and check the airflow temperature.
① Press the [F1] button to change the operation mode. [Fig. 9-2-3] (P.8)
Cooling mode: Check that cool air blows from the unit.
Heating mode: Check that warm air blows from the unit.
Step 4 Confirm the operation of the outdoor unit fan.
The speed of the outdoor unit fan is controlled in order to control the performance of the unit. Depending on the ambient air, the fan will rotate at a slow speed and will keep
rotating at that speed unless the performance is insufficient. Therefore, the outdoor wind may cause the fan to stop rotating or to rotate in the opposite direction, but this is
not a problem.
Step 5 Stop the test run.
① Press the [ON/OFF] button to stop the test run. (The Test run menu will appear.)
Note: If an error is displayed on the remote controller, see the table below.
• For description of each check code, refer to the following table.
① Check code
P1 Intake sensor error
P2, P9 Pipe (Liquid or 2-phase pipe) sensor error
E6, E7 Indoor/outdoor unit communication error
P4 Drain sensor error
P5 Drain pump error
PA Forced compressor error
P6 Freezing/Overheating safeguard operation
EE Communication error between indoor and outdoor units
P8 Pipe temperature error
E4 Remote controller signal receiving error
Fb Indoor unit control system error (memory error, etc.)
PL Refrigerant circuit abnormal
E0, E3 Remote controller transmission error
E1, E2 Remote controller control board error
E9 Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)
UP Compressor overcurrent interruption
U3, U4 Open/short of outdoor unit thermistors
UF Compressor overcurrent interruption (When compressor locked)
U2 Abnormal high discharging temperature/49C worked/insufficient refrigerant
U1, Ud Abnormal high pressure (63H worked)/Overheating safeguard operation
U5 Abnormal temperature of heat sink
U8 Outdoor unit fan safeguard stop
U6 Compressor overcurrent interruption/Abnormal of power module
U7 Abnormality of super heat due to low discharge temperature
U9, UH Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit/
Current sensor error
Others Other errors (Refer to the technical manual for the outdoor unit.)
• On wired remote controller
① Check code displayed in the LCD.
9.2.2. Using wireless remote controller (option)
[Fig. 9-2-4] (P.8)
Ⓐ TEST RUN button
Ⓑ MODE button
Ⓒ FAN button
Ⓓ VANE button
① Turn on the power to the unit at least 12 hours before the test run.
② Press the TEST RUN button Ⓐ twice continuously.
(Start this operation from the status of remote controller display turned off.)
and current operation mode are displayed.
TEST RUN
③ Press the MODE button Ⓑ to activate COOL mode, then check whether cool air
is blown out from the unit.
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Symptom
④ Press the MODE button Ⓑ to activate HEAT mode, then check whether warm
air is blown out from the unit.
⑤ Press the FAN button Ⓒ and check whether fan speed changes.
⑥ Press the ON/OFF button to stop the test run.
Note:
• P oint the remote controller towards the indoor unit receiver while
following steps ② to ⑥ .
• It is not possible to run the in FAN, DRY or AUTO mode.
Remark
For details, check the LED display
of the outdoor controller board.