Mitsubishi PK12FK - User Manual

Questions and Answers

J
Jeremy GonzalesAug 17, 2025
What to do if the Mitsubishi PK12FK Air Conditioner remote controller shows error code 'EO' when turned on?
- C
  Christopher GarciaAug 17, 2025
  If your Mitsubishi Air Conditioner remote controller displays the check code 'EO' when turned on, it indicates a signal transmission error between the indoor unit and the remote controller. To troubleshoot: 1. Connect a sub remote controller. 2. Turn the circuit breaker ON. If the 'centrally controlled' display remains, replace the indoor controller board. If the display disappears, turn the remote controller power button ON and check the remote controller and sub remote controller for malfunctions of the Indoor Unit or Remote controller.
A
Alex AdamsAug 20, 2025
How to fix Mitsubishi Air Conditioner remote display disappearing after turning it on?
- B
  Benjamin StephensAug 20, 2025
  If the operating display on your Mitsubishi Air Conditioner remote appears briefly and then disappears, it could be due to: * A short circuit in the indoor/outdoor connecting wire. * A short circuit in the transmission wire. * Interference from other appliances. To address this: 1. Check the wiring for any short circuits. 2. Turn the circuit breaker OFF and then ON again. If the issue persists, replace the indoor controller board.
W
wheelerjeffreyAug 22, 2025
What to do if my Mitsubishi PK12FK Air Conditioner remote controller display doesn't appear when turned on?
- D
  Dennis PerezAug 22, 2025
  If your Mitsubishi Air Conditioner remote controller display doesn't appear when you turn it on, the possible causes are: * Damaged remote controller. * Short circuit of transmission wire. * Bad contact of indoor CN40. * CN40 is attached to a sub unit. * Damaged transformer. * Bad contact of CN4T. * Blown fuse. * Circuit breaker OFF. To troubleshoot: 1. Measure the voltage between the terminals of the remote controller. If there's no voltage, remove the wire and measure the voltage between the wires. If the voltage is between 6VDC and 12V, replace the remote controller. 2. Check each of the other points. If none are defective, replace the indoor controller board.
K
Kyle ButlerAug 25, 2025
Why does the Mitsubishi PK12FK remote controller display 'CENTRALLY CONTROLLED' and not disappear?
- J
  joy71Aug 26, 2025
  The 'CENTRALLY CONTROLLED' display on your Mitsubishi Air Conditioner remote might persist due to: * Incorrect address settings on the remote controller or indoor controller board. * A timer adapter connected to the remote controller. * A signal transmission error between the indoor unit and the remote controller. To resolve this: 1. Verify the address settings of both the remote and indoor controllers. 2. Ensure the timer adapter is correctly used. 3. As a test, turn DIP SW17-7 ON on another remote to make it a sub-controller, connect it, and turn the circuit breaker ON. If the display disappears, replace the original remote. If it remains, replace the indoor controller board.
F
Fred TravisAug 27, 2025
What does error code P6 mean on a Mitsubishi PK12FK Air Conditioner?
- V
  vkirkAug 28, 2025
  Error code P6 on your Mitsubishi Air Conditioner indicates: * A short air cycle. * A dirty air filter. * A damaged fan. * Abnormal refrigerant. To resolve this: 1. Clear any obstructions from the air cycle. 2. Clean the air filter. 3. Check the fan. 4. Check the refrigerant temperature.
P
Patrick BryantAug 30, 2025
What does error code P8 mean on a Mitsubishi PK12FK?
- B
  Benjamin HessAug 30, 2025
  Error code P8 on your Mitsubishi Air Conditioner suggests: * Incorrect wiring of the indoor/outdoor connecting wire. * Reversed phase. * The protection device is working. * A damaged outdoor coil thermistor. To troubleshoot: 1. Check the indoor/outdoor connecting wire. 2. Change the connection of electric wiring. 3. Check the protection device. 4. Measure the resistance of the outdoor coil thermistor. If the resistance is normal, replace the outdoor controller board.
S
smithjamesSep 1, 2025
What does error code P7 mean on a Mitsubishi PK12FK?
- S
  Stephen FlemingSep 1, 2025
  Error code P7 on your Mitsubishi Air Conditioner indicates: * Wrong address-setting. * Signal transmitting/receiving circuit of remote controller is abnormal. * Wrong SW6-setting. To solve this problem: 1. Check the address-setting. 2. Check with another remote controller. If check code other than “P7” appears, replace the original remote controller. 3. Check SW6 setting.
B
Bradley AverySep 4, 2025
What does error code E0 mean on a Mitsubishi Air Conditioner?
- M
  Megan BurkeSep 4, 2025
  Error code E0 on your Mitsubishi Air Conditioner suggests: * Bad contact of transmission wire. * Signal transmitting/receiving circuit is abnormal. To troubleshoot: 1. Check the transmission wire. 2. Check with another remote controller. If “E0” is still indicated, replace the indoor controller board. If other check code appears, replace the original remote controller.
J
Joshua KaufmanSep 6, 2025
What does error code P3 mean on a Mitsubishi Air Conditioner?
- M
  melinda71Sep 6, 2025
  Error code P3 on your Mitsubishi Air Conditioner is caused by: * Bad contact of transmission wire. * Signal transmitting/receiving circuit is abnormal. * Wrong operation due to noise wave emitted by other appliances. To resolve this: 1. Check the transmission wire. 2. Check with another remote controller. If “P3” is still indicated, replace the indoor board. If other check code appears, replace the original remote controller. 3. Short-circuit between 1 and 2 of CN40 and attach CN40 to the following units: second unit in twin control, second and third units in triple control, or sub units in group control.
J
Jerry CruzSep 9, 2025
What does error code P5 mean on a Mitsubishi Air Conditioner?
- C
  Crystal KaneSep 9, 2025
  Error code P5 on your Mitsubishi Air Conditioner indicates: * Malfunction of drain pump. * Damaged drain sensor. To troubleshoot: 1. Check the drain pump. 2. Check the drain sensor. (Check the drop of water is on.) If the resistance is normal, replace the indoor controller board.