Mitsubishi 20-MYA Specifications Page 111
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- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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6. Troubleshooting
State of Machine
Cause Check point
1. The fun does not run.
Content of confirmation
3) The transformer (T01) is defective.
4) The thyristor module (SCRM) is defective.
5) The control printing wiring board is
defective.
6) The fan motor and unit side control box
are defective.
2) Connected mistake
1) The power-supply voltage is abnormal. The value of power-supply voltage is
confirmed. (TB IN)
Fan power supply wiring is connected
with fan controller power supply taking
out part, and confirm operation.
The blinking of LED01 is confirmed.
The resistance is confirmed.
(Between the lines of primary side, and
lines of secondary side.)
The content of P15 is checked. (SCRM) The content of P15 is judgment. (SCRM)
Whether the voltage is input to fan motor is
confirmed.
Whether the fan motor operation is
confirmed.
The fan controller connection is confirmed.
The unit side connection is confirmed.
Is the power-supply voltage 342-457V?
Troubleshooting
Replace the transformer in case of abnormal
resistance.
When the voltage impression and fan motor does
not work, fan motor is defective.
When the voltage is not impressed to the fan, the
unit side control box is defective.
When there is no wrong above-mentioned,
it is assumed fan controller connection state,
if abnormality relapses, the control printing board
is defective and exchange.
Replace SCRM when abnormality is found.
At the time of turning on light. (always)
The CN01 connector is removed, and measures
resistance. When the resistance is 1 kilo-ohm or
less, repair the control printing board due to the
thermistor short-circuit breakdown.
In case of thermistor is correct, the control
printing board is defective and exchange.
At the time of turning off light.
The CN01 connector is removed, and measures
resistance. When the resistance is 25 kilo-ohm or
more, repair the control printing board due to the
thermistor open breakdown.
In case of thermistor is correct, the control
printing board is defective and exchange.
The wiring mistake is corrected.
The power supply wiring is confirmed,
and corrected.
TB OUT - fan motor
Resistance between the lines of primary side
(red and white) about 310 ohm.
Resistance between the lines of secondary
side (CN02 the connector is removed from
the printing wiring board.)
Between 1-3 pin about 0.9 ohm
CN02- thermistor
NF-SCRM-TB OUT
CNU, CNV, CNW-SCRM
(The connection is noted.)
TB IN-NF wiring
TB IN-T01-CN02.
After checking item 1)-4), when the power
supply is turned on, the blinking of LED01 is
confirmed.
Please intercept the power supply without fail, and secure safety when you execute detaching wiring, the connector,
and the measurement machine to the following work.
- DATA BOOK 1
- SPECIFICATION GUIDELINES -113 3
- SAFETY FOR USE 4
- A COMPLETE LINE UP 6
- FEATURES 7
- DESCRIPTIONS 7
- TYPICAL INSTALLATION EXAMPLE 8
- MECHANICAL SPECIFICATIONS 8
- MODEL-DESIGNATION BREAKDOWN 9
- PE-10 MYC 9
- SPECIFICATIONS 10
- PEH-5,7,8MYA 11
- Heat pump 11
- PEH-10,15,20MYA 12
- ELECTRICAL DATA 13
- PEH-5,7,8MYA-EU 14
- PEH-10,15,20MYA-EU 16
- SELECTION PROCEDURE 18
- Factor for Various Air Flow 19
- CAPACITY TABLES 20
- Heating Capacity 21
- (Standard Air Flow) 21
- (PEH only) 39
- FAN PERFORMANCE 40
- PE-15MYC1-EU 41
- PEH-15MYA-EU 41
- PE-20MYC-EU 41
- PEH-20MYA-EU 41
- (1) Shape of belt groove 42
- SOUND DATA 43
- OUTLINE DIMENSIONS 45
- PE(H)-10 46
- PE(H)-15 46
- PE(H)-20 47
- PU(H)-7,8,10 48
- (Upper blow) 48
- PUH-8,10 49
- (Side blow) 49
- PUH-15,20 50
- PAC-204RC 52
- Attach the accessory 53
- LOW AMBIENT 64
- COOLING PARTS 64
- MF1 Note 65
- PE-15MYC1-EU PE-20MYC-EU 66
- PEH-15,20MYA-EU 67
- REFRIGERANT SCHEMATICS 68
- SAFETY & CONTROL DEVICES 69
- PEH-7,8,10MYA-EU 70
- SPECIAL ORDER 71
- PHYSICAL DATA 72
- [INDOOR AIR CIRCUIT] 73
- [EVAPORATOR] 73
- [OUTDOOR AIR CIRCUIT] 73
- [CONDENSER] 73
- [ENCLOSURE AND FRAME] 74
- 2-EU PUH-10MYE1-EU 78
- INSTALLATION 81
- PU(H)-7,8, 10 (Upper blow) 82
- (1) At a single installation 83
- Indoor unit 84
- 3. Installation of the unit 85
- Outdoor unit 85
- Duct construction 86
- Lifting method 86
- Piping connection 87
- Refrigerant piping 88
- Airtight test 89
- Evacuation 89
- Additional refrigerant charge 89
- Drain piping 90
- Electric wiring 91
- Upper blow 92
- PE(H)-7:Single phase 93
- Refer to (3)-4 94
- Refer to (3)-3 94
- Refer to (3)-5 94
- (Not change) 95
- Detail section A 96
- LCD remote controller inside 96
- Check items 97
- Obstacle blocking air inlet 98
- 2. Caution for use 99
- 3. Maintenance 99
- Flexion load (W) 100
- 1.4 kg 2.2kg 100
- V pulley 100
- 9. Troubleshooting 102
- HOW TO OPERATE 103
- 2. Selecting operation 104
- 4. Time setting 105
- 5. Other function 105
- 1. Outline 106
- 3. Parts 106
- 2. Caution 106
- 4. Installation 107
- 4-2. PUH-15,20 108
- 4-3-1. Install 109
- 4-3-2. Wiring 109
- Confirmation 110
- Fan controller layout 110
- 6. Troubleshooting 111
- Thyristor module 114
- SPECIFICATION GUIDELINES 115
- DATA BOOK PE,PEH 116
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