MITSUBISHI ELECTRIC PE-15MYC - Manual (Page 103)

8. Before starting the Trial run.
Check items
Perform trial operation after completion of the above items.
(1) Check to see wheter there are refrigerant leakage, and slack power or transmission cable.
(2) Conform that 500V megohmmeter shows 1.0M ohm or more between power supply terminal and
ground.
(3) Do not operate in the case of 1.0M ohm or less.
Note : Never carry out megger-ohm check over terminal control board.
Otherwise the control board would be broken.
(4) Check to see wheter both gas and liquid valves are fully opened.
Note : Be sure to tighten caps.
(5) Turn universal power supply at least 6 hours before gettig test run in order to current to crank heater.
If current-carrying hours are too short, it may result in a malfunction of compressor.
(6) Confirm operation of high-pressure switch.
If the two lead wires of the outdoor unit fan motor are disconnected from the connector and cooling
is performed, the high-pressure switch should operate and stop the unit after 5 to 10 minutes.
(7) Confirm that the fans of the indoor and outdoor unit rotate in the correct direction.
Change the power supply phase connections if it is rotating in the reverse direction.
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7. The putting condition of the belt.
A
K
K
K
K
K
1.Set the parallel angle of the fan and the motor pulley as shown in the table and figure 1 below.
2.Set the tension of the per one belt when the flexion load is within the range as shown in the figure 1
below at the proper flexion. (A=4.5mm)
3.Adjust the suitable tension after the belt sit properly across the pulley (after more 24-28 hours working).
When the new belt is used, adjust the suitable tension about the 1.3 times of the maximum value of the
flexion load.
4.Readjust the belt every 2,000 hours after the first adjustment.
Exchange the belt when the belt's surroundings length has expanded by 2% including the first expansion
of the belt. (about 1%)
(about 8,000 hours converted working time)
Figure2 Belt tension Figure1 Parallel degree of pulley
A=4.5mm
pulley
parallel angle
pulley
K ( )
10 or less gap of 3mm every 1m
note
table
Flexion load(W)
1.4 2.2kg
(PE(H)-15,20 only)