MRCOOL Mini Split Error Codes
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Featured codes
- EC07 — EC 07 means outdoor fan speed stays too low or too high for the manual's detection ti
- H03 — H03 corresponds to Midea's EH03 code: the indoor fan speed is operating outside of th
- EC51 — EC 51 means the outdoor PCB main chip does not receive feedback from the outdoor EEPR
- EC52 — EC 52 means outdoor coil temperature sensor T3 sampling voltage is lower than 0.06V o
- EC53 — EC 53 means outdoor ambient temperature sensor T4 sampling voltage is lower than 0.06
- EC54 — EC 54 means compressor discharge temperature sensor TP sampling voltage is lower than
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Safe checks with an external tool or supply
These pages list the check you can do from outside the unit, with an optional external tool or maintenance supply. None of them repair an internal fault.
- EC07 — MRCOOL EC07 (shown as F5 on some displays) means the outdoor fan speed is out of the normal range - typically …
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Manufacturer manuals
- Manufacturer manual links are being cataloged for this brand.
E codes
- MRCOOL EC07 error code
MRCOOL EC07 (shown as F5 on some displays) means the outdoor fan speed is out of the normal range - typically debris or ice blocking the fan, a loose … - MRCOOL EC51 error code
EC 51 means the outdoor PCB main chip does not receive feedback from the outdoor EEPROM chip. The control is naming a specific inverter, voltage, or c… - MRCOOL EC52 error code
EC 52 means outdoor coil temperature sensor T3 sampling voltage is lower than 0.06V or higher than 4.94V. The control is naming a specific inverter, v… - MRCOOL EC53 error code
EC 53 means outdoor ambient temperature sensor T4 sampling voltage is lower than 0.06V or higher than 4.94V. The control is naming a specific inverter… - MRCOOL EC54 error code
EC 54 means compressor discharge temperature sensor TP sampling voltage is lower than 0.06V or higher than 4.94V. The control is naming a specific com… - MRCOOL EC71 error code
EC 71 returns after one safe reset or the condition does not clear. Tell them the manual trigger is "Over-current failure of the outdoor DC fan m… - MRCOOL EC72 error code
EC 72 returns after one safe reset or the condition does not clear. Tell them the manual trigger is "Lack-phase failure of the outdoor DC fan mot…
H codes
- MRCOOL H00 error code
H 00 returns after one safe reset or the condition does not clear. Tell them the manual trigger is "The indoor PCB main chip does not receive fee… - MRCOOL H02 error code
H 02 returns after one safe reset or the condition does not clear. Tell them the manual trigger is "The indoor PCB does not receive zero-crossing… - MRCOOL H03 error code
H03 on MRCOOL mini splits is the indoor fan-speed fault (EH03 family): the blower speed stays too low or too high for the manual's detection time and … - MRCOOL H60 error code
H 60 returns after one safe reset or the condition does not clear. Tell them the manual trigger is "Indoor room temperature sensor T1 sampling vo… - MRCOOL H61 error code
H 61 returns after one safe reset or the condition does not clear. Tell them the manual trigger is "Indoor pipe temperature sensor T2 sampling vo… - MRCOOL H90 error code
H 90 returns after one safe reset or the condition does not clear. Tell them the manual trigger is "High temperature protection of the evaporator… - MRCOOL H91 error code
H 91 returns after one safe reset or the condition does not clear. Tell them the manual trigger is "Low temperature protection of the evaporator&…
L codes
- MRCOOL L01 error code
L 01 returns after one safe reset or the condition does not clear. Tell them the manual trigger is "The indoor unit cannot communicate with the o…