Hyster electric forklifts are among the most technologically advanced industrial transport vehicles on the European market. The heart of every electric Hyster is the traction controller — in the vast majority of models manufactured by the Italian company ZAPI S.p.A. A failure of the ZAPI ACE2, HAZE or ZAPIMOS controller means an immediate forklift shutdown and warehouse standstill. A new controller costs 8,000–22,000 PLN (€2,000–5,000). Acore from Knurow repairs Hyster controllers at component level — we replace damaged IGBT modules, gate driver ICs, DC bus capacitors, current sensors and EEPROM memory — at a fraction of the new controller price.
Hyster Electric Forklift Models — Supported Series
| Series | Models | Load Capacity | Voltage | Traction Controller | Application |
|---|---|---|---|---|---|
| J XN / XNT | J1.6XN, J1.8XN, J2.0XN, J2.5XN, J3.0XN, J3.5XN, J1.6XNT, J2.0XNT | 1600–3500 kg | 48 V / 80 V | ZAPI ACE2 FZ5444 / ZAPI HAZE HZ1045 | Logistics, production, cold stores |
| J XD / XDS | J1.6XD, J1.8XD, J2.0XD, J2.5XD, J3.5XD | 1600–3500 kg | 48 V / 80 V | ZAPI ACE2 / ZAPI ACEX | High-rack warehouses |
| E XN | E1.6XN, E1.8XN, E2.0XN, E2.5XN, E3.0XN, E3.5XN | 1600–3500 kg | 48 V | ZAPI ACE2 36-48/450 (FZ5444-NA) | Outdoor, construction sites, logistics |
| H XN (electric) | H1.6XN–H3.5XN | 1600–3500 kg | 48 V / 80 V | ZAPI ACE2 / ZAPI ACEX 80V/550A | Heavy industry, docks |
| R XD (reach truck) | R1.4XD–R2.5XD | 1400–2500 kg | 48 V | ZAPI ACE2 / ZAPIMOS | High rack storage |
| P XD (pallet trucks) | P1.6XD–P2.5XD, P1.6E, P2.0E | 1600–2500 kg | 24 V / 36 V | ZAPI ACEX / ZAPIMOS | Commissioning, horizontal transport |
| Classic A / E (older) | A1.50XL, A1.75XL, E1.75XL, E2.00XL, E2.50XL | 1500–2500 kg | 24 V / 48 V | ZAPI ACE (1st gen) / Curtis 1236 | Legacy fleets — regeneration |
ZAPI ACE2 Controller — Technical Data
The ZAPI ACE2 evolution controller (as shown in the photo — FZ5444-NA.8821933, 36-48V/450A, DISS.TRAS) is a three-phase AC inverter for asynchronous traction motors. Key internal components: IGBT modules IXGN200N60B3 or SKM200GB125D, gate drivers CONCEPT 2SD315AI or Infineon 1ED020I12F2, DC bus capacitors 4× 3300 µF/100 V (Nichicon), current sensors LEM LF 310-S, microcontroller STM32F407 (ARM Cortex-M4), EEPROM ST M95256-W (SPI 256 kbit), CAN bus 250 kbps, main contactor Tyco EV200.
ZAPI ACE2 Fault Codes — Complete Table
| Code | MDI Message | Hardware Root Cause | Measurement | Repair Cost |
|---|---|---|---|---|
| 13 | EEPROM KO | Failed EEPROM M95256-W (256 kbit SPI). Loss of parameters: speed settings, joystick calibration, acceleration time. | Read SPI bus: check CS, SCK, MOSI, MISO (3.3V logic). No response = replace 8-pin SOIC8 EEPROM. | 400–800 PLN |
| 22 | I_SHT SHORT CIRCUIT | Short circuit detected: blown IGBT module (C-E shorted), motor phase short or failed LEM LF 310-S current sensor. | IGBT diode test: C-E forward should be 0.45–0.65 V. Zero Ω = shorted IGBT. Motor phase resistance U-V, V-W, W-U should be equal (typ. 0.1–0.5 Ω). | 1,200–3,500 PLN |
| 26 | CAPACITOR CHARGE | DC bus capacitors not charging within time limit. Blown precharge resistor (22–47 Ω/50 W), failed Tyco EV200 precharge relay or open capacitors. | Measure bus voltage 3 s after power-on: should reach >90% of battery voltage. Below 70% = check precharge resistor. | 600–1,500 PLN |
| 27 | CONT. OPEN | Main contactor failed to close. Blown contactor coil (Albright SW180, Tyco EV200) or failed coil driver MOSFET IRFZ44N on PCB. | Measure coil resistance: Albright SW180 = 14–22 Ω @ 48V DC. OL = blown coil. MOSFET gate: 0 V inactive, 12 V active. | 500–1,200 PLN |
| 37 | CONTACTOR CLOSED | Main contactor mechanically welded (stuck contacts). Dangerous — forklift cannot regenerative brake. Immediate stop required. | Disconnect coil, measure main contacts: should be open (OL). Continuity = welded contacts, replace contactor immediately. | 700–1,800 PLN |
| 53 | WATCH-DOG | STM32F4 CPU watchdog reset. Cause: failed 8 MHz crystal, 3.3V power noise, or corrupted Flash firmware checksum. | Measure crystal with oscilloscope: 8 MHz ±100 ppm. Check 3.3V VDD. Cyclic reset = reflash firmware via SWD port. | 500–1,200 PLN |
| 78 | VACC NOT OK | Accelerator potentiometer voltage (VACC) >1.0 V at released joystick. Short in potentiometer or wiring (0–5 V analog). Controller blocks travel as safety measure. | Measure VACC at controller connector: 0.3–0.5 V at zero, 4.5–4.7 V at full deflection. Above 1.0 V at rest = joystick or wiring fault. | 200–600 PLN |
| 84 | ENCODER FAULT | Missing or incorrect motor encoder signals (1024 PPR, Hall-effect or incremental). Damaged encoder or broken cable (A, B or Z wire). | Measure A, B signals with oscilloscope during motor rotation: amplitude 5 V, f = rpm × 1024/60 Hz. No signal = failed encoder or cable. | 500–1,200 PLN |
| 86 | NO FIELD FLUX | Controller cannot detect motor magnetic flux — failed Auto-Tuning calibration or damaged stator windings. Required on first startup or after controller replacement. | Run Auto-Tuning via ZAPI Console. If it fails — measure winding inductance U-V, V-W, W-U (typ. 0.5–2 mH). Asymmetry >10% = damaged stator. | 300–800 PLN (recalibration) / 2,000–8,000 PLN (motor) |
Service Area — Europe and Poland
We repair Hyster / ZAPI ACE2 controllers for customers across Poland and Europe. Controllers are accepted by courier or in person. Key locations served:
Poland: Gliwice (12 km), Katowice (26 km), Wroclaw (190 km), Lodz (230 km), Poznan (270 km), Warsaw (290 km), Gdansk (420 km), Krakow (100 km), Czestochowa (80 km), Bielsko-Biala (55 km).
Germany: Berlin, Hamburg, Munich, Frankfurt, Düsseldorf, Stuttgart, Leipzig, Cologne — DHL Express 1–2 business days. Flat rate €35 both ways.
Czech Republic and Slovakia: Prague, Brno, Ostrava, Bratislava, Zilina, Kosice — 100–320 km. DPD/DHL 1–2 days.
Austria, Hungary: Vienna, Graz, Budapest, Gyor — automotive sector (Audi, BMW, VW, Samsung SDI).
Italy, France, Netherlands, Belgium, UK: DHL Express 2–4 days. Door-to-door repair service.
Ukraine: Kyiv, Lviv, Dnipro — shipping via Medyka–Shehyni border crossing.
FAQ
- Hyster J2.5XN does not drive, shows fault code 22 (I_SHT). Is it definitely the controller?
- Fault 22 detects an output short. Before sending the controller: (1) disconnect motor cables and restart — if fault clears, problem is in motor windings or phase wiring, not the controller. (2) If fault remains with motor disconnected — controller has a blown IGBT module or failed LEM sensor. Send the controller for diagnosis.
- After replacing ACE2 controller on Hyster E2.0XN, fault 86 NO FIELD FLUX appears. What to do?
- After controller replacement, Auto-Tuning procedure is mandatory via ZAPI Console: controller must learn the specific motor parameters (inductance, resistance, inertia). Connect laptop with ZAPI Console via CAN dongle → PROGRAMMING → MOTOR TUNING → START. Procedure takes 2–5 min. If it fails — measure motor windings. Acore performs calibration as part of controller repair service.
- Shipping from Germany — how long and what cost?
- DHL Express 1–2 business days. Flat rate 150 PLN (approx. €35) for shipping both ways, insured up to 50,000 PLN. Free shipping both ways for repairs above 3,000 PLN.
- Is fault 37 (CONTACTOR CLOSED) dangerous?
- Yes — fault 37 means mechanically welded main contactor contacts that do not open despite the control signal. The forklift cannot regeneratively brake and may move uncontrollably after releasing the joystick. Immediate operational stop and replace Albright SW180 or Tyco EV200 contactor. Repair cost: 700–1,800 PLN.