Test Run - Mitsubishi Electric PUH-P200MYA Technical & Service Manual

8 Test run

(1) Test run (For PUH-P200MYA/P250MYA)
The test run can be carried out either from the outdoor unit or the indoor unit.
1. Check list
• After the installation, piping setup, and wiring of the indoor and outdoor units is complete, check that refrigerant is not
leaking, the power and control wires are not loose, and the poles are not reversed. (When connecting model PEH-(R)P-MYA
in particular, check that there is current in the separate power supply cable for the indoor unit.)
• Use a 500 V insulation resistance tester to make sure that the resistance between the power terminal and the ground is
1.0 MΩ or more. If it is less than 1.0 MΩ, do not operate the unit. * Absolutely do not touch the tester to indoor/outdoor
connection terminals S1, S2, and S3. An accident could occur.
• Make sure there is no malfunction in the outdoor unit. (If there is a malfunction, you can diagnose it using LED1 on the
board.)
• Check that the ball valve is fully open on both the liquid and gas ends.
• Check the electrical power phase. If the phase is reversed, the fan may rotate in the wrong direction or stop, or unusual
sounds may be produced.
• Starting at least 12 hours before the test run, send current through the crankcase heater. (If the current is running for a
shorter period of time, damage to the compressor could result.)
After the above checks are complete, carry out the test run as indicated in the following outline.
2. Starting and finishing the test run
• Procedure from the indoor unit: carry out the test run as in the manual provided with the indoor unit.
• Procedure from the outdoor unit: start and stop the test run and set test run mode (cooling/heating) using the SW4 dip
switches on the board.
a) Set test run mode (cooling/heating) using SW 4-2.
b) The test run will begin when SW 4-1 is turned ON, according to the mode selected by SW 4-2.
c) The test run is stopped when SW 4-1 is turned OFF.
Note:
Test run mode cannot be stopped during operation by using SW 4-2. (If the operation mode is to be changed, first
stop it using SW 4-1, then after changing the operation mode, start the test run again using SW 4-1.)
• If the 2-hour timer is set, the test run will stop automatically after 2 hours.
• During the test run, the room temperature display on the indoor unit will indicate the temperature of the indoor unit piping.
<SW4>
OFF ON
1
2
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