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Mitsubishi Electric PLA-A12EA8 - User Manual

Mitsubishi Electric PLA-A12EA8
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1
TCH120A
SERVICE MANUAL
CONTENTS
1. REFERENCE MANUAL
........................
2
2. SAFETY PRECAUTION
........................
3
3. PARTS NAMES AND FUNCTIONS
......
6
4. SPECIFICATIONS
.................................
7
5. NOISE CRITERION CURVES
.............
10
6. OUTLINES AND DIMENSIONS
............
12
7. WIRING DIAGRAM
.............................
13
8.
REFRIGERANT SYSTEM DIAGRAM
......
14
9. TROUBLESHOOTING
........................
15
10. FUNCTION SETTING
.........................
30
11. SPECIAL FUNCTION
..........................
31
12. DISASSEMBLY PROCEDURE
...........
34
13. REMOTE CONTROLLER
................... 41
PARTS CATALOG (TCB120)
WIRED REMOTE
CONTROLLER
(Option)
INDOOR UNIT
Model name
indication for
MAIN UNIT
Model name
indication for GRILLE
PLA-A12EA8
PLA-A18EA8
PLA-A24EA8
PLA-A30EA8
PLA-A36EA8
PLA-A42EA8
PLA-A48EA8
PLA-A12EA8
PLA-A18EA8
PLA-A24EA8
PLA-A30EA8
PLA-A36EA8
PLA-A42EA8
PLA-A48EA8
Indoor unit
[Model Name] [Service Ref.]
SPLIT-SYSTEM HEAT PUMP
No. TCH120
August 2023
MENU
ON
OFF
RETURN
SELECT
HOLD
Grille model
[Model Name]
PLP-41EAEU
WIRELESS REMOTE
CONTROLLER
(Option)
REVISED EDITION-A
Revision:
• Some descriptions have been
revised in REVISED EDITION-A
TCH120 is void.

Table of Contents

Questions and Answers

  • S
    Sarah LaneAug 12, 2025
    Why only LED 1 is lit and LED 1, 2 blink on Mitsubishi Electric Air Conditioner?
    • R
      Rebecca MoranAug 12, 2025
      If only LED 1 is lit and LED 1 and 2 blink after about 3 minutes of power-on, check the connections and phase wiring for the outdoor unit's power terminal block. This issue may be due to the connector for the outdoor unit’s protection device not being connected, or reverse/open phase wiring for the outdoor unit’s power terminal block (L1, L2, GR).
  • A
    Amanda MooreAug 21, 2025
    What to do if the trouble with Mitsubishi Electric Air Conditioner is not reoccurring and is logged?
    • C
      Carl HobbsAug 21, 2025
      Consider the possibility of temporary defects such as the activation of protection devices in the refrigerant circuit (including the compressor), poor wiring connections, or noise issues. Re-check the reported symptom, and inspect the installation environment, refrigerant amount, and weather conditions at the time the trouble occurred, as well as any wiring-related factors. After completing the service, reset the check code logs and restart the unit.
  • J
    Jeremy SchmidtSep 1, 2025
    What to do if the trouble with Mitsubishi Electric Air Conditioner is not reoccurring and is not logged?
    • J
      James OsborneSep 1, 2025
      Re-check the abnormal symptom. If the cause is not ascertained, continue to operate unit for the time being.

Mitsubishi Electric PLA-A12EA8 Specifications

General IconGeneral
Power Supply220-240 V, 50 Hz
RefrigerantR32
Outdoor Unit Dimensions (HxWxD)550 x 780 x 285 mm
Power Source220-240 V, 50 Hz
Energy Efficiency Ratio (Cooling)3.5
Noise Level (Outdoor Unit)50 dB(A)

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