Mitsubishi Heavy Industries aircon E58
Use this Mitsubishi Heavy Industries E58 guide to capture the fault correctly and see what should be checked before parts are quoted. Match the model first; same-looking signals can point to different rows.
What does Mitsubishi Heavy Industries E58 mean?
Mitsubishi Heavy Industries E58 is listed as current safe stop and current-safe or current-limit protection in Inverter Split, Multi-Split, Single-Split rows such as Singapore Rocket YYS single split, SRK-YYS indoor with SRC-YYS outdoor. The loaded row is source-backed by official diagnostic material. Do not collapse this code across model families; use the model, series, or system type to choose the right row. Confirm the exact model, series, or signal row before accepting a parts quote.
Choose the matching source row
The same visible code has more than one source-backed meaning. Match the model family, system type, or reporting unit before approving parts.
| Code | What it means | What to check first |
|---|---|---|
| Singapore Rocket YYS single split / MHI Service Support Handbook RAC RUN/TIMER checklist | Current safe stop | Match this row to the installed model or reporting unit, then use the source-specific checks below. |
| Inverter PAC SRC outdoor diagnostics | Current-safe stop from overload, overcharge, or compressor locking | Confirm the installed unit belongs to Inverter PAC SRC ZHX-S / ZIX-S / ZJX-S / ZMX-S / ZSX-S outdoor units before using this meaning. |
| Inverter KX VRF diagnostics | Compressor loss-of-synchronism fault | Confirm the installed unit belongs to Inverter KX KX4 / KX6 / KXRE6 / KXZE1 / KXZPE1 / KXZRE1 systems before using this meaning. |
What to do now
Use these steps before customer action, gas work, a pressure check, or parts quote.
Stop using the unit if E58 returns
Stop using the unit if E58 returns with high-pressure trips or abnormal outdoor operation. Preserve the code and arrange source-specific charge and pressure checks.
No manufacturer reset steps listed for E58
Capture the complete E58 pattern and model stickers first. The selected source row lists no customer reset procedure; do not treat a generic power-cycle as manufacturer guidance.
Send these to us
E58 error code and blinking light, a clear display photo and blinking-light video if the unit shows one, Mitsubishi Heavy Industries model stickers, affected rooms, operating state when the code appeared, and commissioning or recent refrigerant-work history
Source-specific guidance
These diagnostic-reference notes help match the code to the exact model. Electrical, refrigerant, wiring, resistance, and component checks are technician work, not DIY steps.
| Source detail | What it says |
|---|---|
| Singapore / model note | Singapore Rocket YYS model family is from the Mitsubishi Heavy Industries Aircon Singapore residential page and RAC catalogue. Fault rows are from the official MHI RAC single-split indication table; no exact public Singapore YYS fault manual was found. |
| Singapore / model note | MHI Service Support Handbook pages 16-18 RAC indication table. This is a broad residential RAC cross-check, not a model-specific operation manual; non-residential handbook sections are excluded. Checklist cause: Overload operation or refrigerant overcharge. |
| Singapore / model note | Official current MHI commercial error-table row E58. PAC/KX family applicability and display detail are cross-checked against MHI Service Support Handbook PDF pages 31, 38. Confirm the installed model family and its own service manual before parts replacement; no Singapore-only model mapping is claimed. |
What to check before repair
Use this split to separate safe evidence capture from the tests a technician should prove before quoting parts.
| You can check | Technician should confirm |
|---|---|
| Before taking any system action on E58, take a clear display photo and blinking-light video if the unit shows one. | Match E58 to the exact overcharge or high-pressure source row before changing the refrigerant charge. |
| Capture the Mitsubishi Heavy Industries indoor and outdoor model stickers so the correct family row is used. | Compare the specified charge with commissioning records and measured operating conditions. |
| The selected source row lists no customer reset procedure. Note whether one room, several rooms, or the whole system is affected. | Follow the source-specific checks for metering devices, sensors, airflow, and installation before adjusting charge. |
Charge or high-pressure decision
Mitsubishi Heavy Industries E58 needs the specified charge, commissioning record, measured pressure, and source-listed high-pressure checks verified before refrigerant is adjusted. Keep diagnosis on the documented overcharge or high-pressure branch unless separate evidence proves a different fault.
The specified refrigerant charge must be matched to the installed model and pipe configuration.
Commissioning records and measured high-pressure conditions should be checked before charge is changed.
Metering devices, sensors, airflow, and installation conditions need source-specific evidence before parts or refrigerant work are approved.
Mitsubishi Heavy Industries E58 questions
What does the Mitsubishi Heavy Industries E58 error mean?
Can I fix a Mitsubishi Heavy Industries E58 error myself?
Is it safe to keep running the aircon with an E58 error?
What causes a Mitsubishi Heavy Industries E58 error?
Will a Mitsubishi Heavy Industries E58 error need a repair or a full replacement?
What should I send a technician about a Mitsubishi Heavy Industries E58 error?
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