Mitsubishi Electric PVFY-P12 NAMU-E, Руководство по обслуживанию

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Specifications are subject to change without notice. © 2017 Mitsubishi Electric US, Inc.
2) LEV operation
(f)
(a)
(b)
(e)
(d)
(c)
(a) Close
(b) Open
(c) Fully open valve (2000 pulses or 3000 pulses)
(d) No. of pulses
(e) Extra tightening (41 - 100 pulse)
(f) Valve opening degree
•
When the power is turned on, a pulse signal of fully open pulse + 10% pulse is output (valve closure signal),
to bring the valve to position A.
•
When the valve is operating normally, it is free of vibration noise. If the valve locks or when it goes from point
E to A in the figure, it makes louder noise than would be heard when there is an open phase.
•
Check for abnormal sound/vibration by placing the metal tip of a screwdriver against the valve and the handle
side against your ear.
3) Troubleshooting
Symptom Checking Criteria Remedy
Circuit failure on
the microcomputer
Disconnect the connectors on the control board, and connect LEDs to
test the circuit as shown below.
Replace the indoor
control board if
driving circuit
failure is detected.
6
5
4
3
2
1
1 k
LED
Pulse signals are output for 10 seconds when the main power is
turned on. If there are LEDs that do not light up at all or remain lit
after the pulses are turned off, there is a problem with the driving
circuit.
Locked LEV The motor will idle and make small clicking noise if it is run while the
LEV is locked. If this clicking noise is heard both when the valve is
fully closed and while it is being opened, it indicates a problem.
Replace the LEV.
Disconnected or
shorted LEV motor
coils
Measure the resistance between the coils with a tester (red-white,
red-orange, Red-yellow, Red-blue). The normal range of resistance is
150k Ω± 10%
Replace the LEV.