Hitachi 01601 fault code
Hitachi air conditioning
What the Hitachi 01601 fault code means, from the manufacturer's own service literature, and the UK models it applies to.
What it means
The compressor stopped on a high-load condition — head pressure / temperature driven too high, most often poor heat rejection or an overcharge.
Source: Hitachi Technical Catalogue §9.10 / §10.1.2 Error Code Information (RAK-PSES(W)/RAC-WSE — Hitachi UK; RAK-PED/RAC-WED — Hitachi R32 catalogue), both render-verified
UK models this code applies to
Tap yours to open 01601 on that machine.
Wall-mounted39
Cassettes32
Ducted29
Ceiling suspended7
Ceiling or floor8
Floor consoles6
Floor-standing8
Multi-split outdoor units7
Outdoor units63
01601 on these comes from each model's own manual, which may not match the meaning above — tap yours to read it.
Wall-mounted13
Cassettes4
Ducted6
Indoor and outdoor pairs2
Now the harder half: proving what caused it
01601 names a symptom, not a root cause. In the app, the same code opens a guided investigation: what to measure first, the expected values for your exact model, and an honest verdict — including “nothing in this machine is broken” when that's what the readings say.
Chase 01601 on your machine →Free, no sign-up. Pick the model: where we hold a chart for it, it takes you through one question at a time.
Or watch one get chased — free demo →
Or use it in your browser on any phone or laptop.
Related codes
- 01001Abnormal power source (code 10)
- 01101Fan stop for strong wind (code 11)
- 01200Communication error, indoor ↔ outdoor (code 12) — RAK-PSE models
- 01201Outdoor fan motor fault (code 12)
- 01300Data reading error (PSE: EEPROM · PED: IC401) (code 13)
- 01301EEPROM reading error (code 13)
- 01401Active converter defective (code 14)
- 01501Abnormal PWB circuit (code 15)
- 01800Cleaning defective (auto-clean) (code 18) — RAK-PSE models
- 02000Human sensor defective (code 20) — RAK-PSE models