Possible Causes:
1️⃣ Fuse is burnt or breaker is tripped
2️⃣ Incorrect voltage to the motor
3️⃣ Loose or faulty wiring connections
4️⃣ "Up" button is defective
5️⃣ AC Contactor is defective
6️⃣ Overhead or lower limit switch is faulty
7️⃣ Motor windings burned out
Remedies:
1️⃣ Replace the fuse or reset the circuit breaker (Use ‘C’ or ‘D’ rated breaker of the correct amperage)
2️⃣ Supply the correct voltage to the motor
3️⃣Repair, replace, insulate, and tighten all wires
4️⃣ Replace the “Up” button
5️⃣ Swap out the AC contactor
6️⃣ Replace the overhead or lower limit switch
7️⃣ Install a new motor
Possible Causes:
1️⃣ Start capacitor is defective (for 1-phase motors only)
2️⃣ AC Contactor is faulty
Remedies:
1️⃣ Replace the start capacitor (for 1-phase motors)
2️⃣ Swap out the AC contactor
Possible Causes:
1️⃣ Plugged oil filter screen
2️⃣ Cracked or loose oil suction tube
3️⃣ Lowering valve stuck open
4️⃣ Low hydraulic oil level
5️⃣ Oil pump not priming
Remedies:
1️⃣Clean or replace the oil filter screen
2️⃣Replace or tighten the oil suction tube
3️⃣Clean or replace the lowering valve
4️⃣Refill the hydraulic oil (Refer to the owner’s manual)
5️⃣Replace the oil pump
Possible Causes:
1️⃣ Debris in the lowering valve
2️⃣ Motor running on low voltage
3️⃣ Pressure adjust valve out of calibration
4️⃣ Lift is overloaded
Remedies:
1️⃣ Clean or replace the lowering valve
2️⃣ Ensure the motor receives the correct voltage
3️⃣ Adjust or replace the pressure adjust valve
4️⃣ Verify the weight limit & ensure even distribution
Possible Causes:
1️⃣ External hydraulic oil leak(s)
2️⃣ Debris in the lowering valve
3️⃣ Debris in the check valve
Remedies:
1️⃣ Repair any hydraulic leaks
2️⃣ Clean or replace the lowering valve
3️⃣ Clean or replace the check valve
Possible Causes:
1️⃣ Air mixed with hydraulic oil
2️⃣ Loose oil-return tube
3️⃣ Overfilled hydraulic system
Remedies:
1️⃣ Repair external leaks
2️⃣ Clean or replace the lowering valve
3️⃣ Clean or replace the check valve
Possible Causes:
1️⃣ Air and oil mixing (causing foamy oil cavitation)
2️⃣ Loose power unit mounting bolts
3️⃣ Worn-out motor coupling
4️⃣ Clogged oil filter screen
Remedies:
1️⃣ Change old hydraulic oil with fresh oil
2️⃣ Tighten power unit mounting bolts
3️⃣ Replace motor coupling
4️⃣ Clean or replace the oil filter screen
Possible Causes:
1️⃣ Low hydraulic oil level
2️⃣ Cracked or short oil suction tube
Remedies:
1️⃣ Add more hydraulic oil
2️⃣ Replace the oil suction tube