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Test Run - Mitsubishi Electric PLH-2 Installation Manual

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8. Test run

E
8.1. Before test run
s After installation of indoor and outdoor units, and piping and elec-
tric wiring work, re-check that the unit is free from leaks of refrig-
erant, loosened connections, and incorrect polarity.
s Measure an impedance between the power supply terminal block
(L, N) on the outdoor unit and the ground with a 500 V Megger and
check that it is equal to or greater than 1.0 MΩ Ω Ω Ω Ω .
For the heater integrated units, make the similar measurement on
the heater power supply terminal block (L, N,
(∗ ∗ ∗ ∗ ∗ ) Never apply any voltage to the both terminal blocks for the
indoor and outdoor unit connection (1, 2, 3) and the remote
controller (1, 2).
s For specific models requiring changing of settings for higher ceil-
ings or selection of power supply ON/OFF capability, make proper
changes referring to the description for Selection of Functions
through Remote Controller.
8.2. Test run procedures
Operating procedures
1 Turn on the main power supply.
While the room temperature display on the remote controller reads
"CENTRALLY CONTROLLED", the remote controller is disabled. Turn
off the "CENTRALLY CONTROLLED" display before using the remote
controller.
2 Press "TEST RUN" button twice.
A The 'TEST RUN' indicator should light up.
3 Press
button.
Cooling/drying mode: Cool air should start to blow.
Heating mode: Warm air should start to blow (after a while).
4 Press
button.
Check for correct motion of auto-vanes.
5 Check the outdoor unit fan for correct running.
The outdoor unit features automatic capacity control to provide opti-
mum fan speeds. The fan keeps running at a low speed to meet the
current outside air condition unless it exceeds its available maximum
power. Then, in actuality, the fan may stop or run in the reverse direc-
tion depending on the outside air, which does not mean malfunction.
6 Press the "ON/OFF" button to reset the test run in progress.
The test run will be automatically shut down after two hours in response
to the AUTO STOP setting of two hours on the timer.
During the test run, the room temperature display shows the indoor
unit tubing temperatures.
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