Troubleshooting Procedures - Mitsubishi Electric MA-E100R-E Service Manual

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Instruction manual (64 pages)

Table of Contents

11 . Troubleshooting Procedures

(1) Symptoms and Remedies

Symptom

1. Blower fan

(motor) does not

rotate (power

does not turn

ON).

2. Dust is not

collected (air

volume is low).

3. Deodorizing is

not performed

(deodorizing

performance is

low).

4. The odor monitor

does not work.

5. The PM2.5

monitor or dust

monitor does not

work.

Check Item

Is an operation mode lamp

lit when you press the

operation switch?

Lit

• How to determine whether the DC motor has a malfunction

The following table shows the values for a normal motor that was measured with a

multimeter.

The motor has a malfunction if any value is very different from the normal value.

Measurement method (pin number of P107 and P108 connectors)

Tester + terminal

Tester - terminal

Pin 1 (red)

Pin 4

Pin 6 (white)

Pin 4

Pin 7 (yellow)

Pin 4

Pin 8 (blue)

Pin 4

Pin 4 (black)

Pin 1

Any pin

Outer casing of motor

The above is the diagnostic method for when the motor is isolated.

Regardless of the rotation state, do not test the motor when the connectors are connected.

Is the pre-filter clogged with

dust?

Is the filter replacement lamp

lit?

Lit

Place perfume, hair tonic,

alcohol for disinfection, or

the like in front of the unit

and check the response.

Was there no response?

Rub tissue paper for 20 seconds

and check the response. Was

there no response?

Check the continuity of the current fuse.

The current fuse has blown.

Not

lit

Replace the power supply control circuit board.

* Pull out the power plug before checking.

Check the connection cables and connectors

of the display operation circuit board and

power supply control circuit board.

Check the output voltage at the

connectors P107 and P108 of the power

supply control circuit board within 45

seconds after turning ON the power.

If 280 VDC is not output normally between

the pins 1 and 4, 15 to 19 VDC is not output

normally between the pins 6 and 4, and 1 to

6 VDC is not output normally between pins 7

and 4, replace the power supply control circuit

board. If the voltages are output normally,

replace the blower motor (pin 4 is GND).

Tester measurement mode Normal value

Resistance

Diode

Resistance

Remove the dust (clean the pre-filter and

HEPA filter).

Replace the HEPA filter with a new one.

Soak and wash the activated charcoal

Not lit

filter.

Replace the activated charcoal filter with a

new one.

Replace the odor sensor.

YES

* Response will be slow immediately after

the power switch is turned ON because the

odor sensor is performing the preparation

operation. Perform operation for about 5

minutes and then perform the check.

Replace the dust sensor.

YES

Remedy

Malfunction diagnosis

Infinity