Section 6.Electrical Tests

Model 9600/9700 Swing-Reach ® Lift Truck

Analog TestsTest A19-LA Temp [LPA Temp]

Test A19-LA Temp [LPA Temp]

Lift Power Amplifier (LPA) temperature is displayed.

While operating, the LPA continuously monitors its internal heatsink temperature. If the temperature gets too high, performance is reduced until the LPA cools down.

•Normal operation: ambient to 175°F (79°C)

•At 185°F (85°C), speed is linearly reduced to 0 fpm at 239°F (115°C), when lift is disabled

•Code 7F is displayed when temperature exceeds 203°F (95°C) or falls below –40°F (–40°C)

As lift is operated, the LPA temperature should increase evenly over time. If not, refer to Diagnosis and Repair.

Diagnosis and Repair

NOTE: For extreme operating conditions where trucks are subjected to repetitive lift/lower cycles, short runs, and/or repetitive plugging cycles without time for the amplifiers to cool, a cooling fan kit is available through the Parts Distribution Center. Refer to the parts manual.

Publication: 1089040, Issued: 08 Apr 2016

Model 9600/9700 Swing-Reach ® Lift Truck

Section 6.Electrical Tests

Test A20-Lft Curr [Lift Motor Current] Analog Tests

Test A20-Lft Curr [Lift Motor Current]

The current the LPA reads from one phase of the lift motor is displayed.

Maximum current: 650A

The test is good if the value displayed is within these limits:

System Condition

Static (at rest)<20A

Full LiftApprox. 460A

NOTE: Because Test A20 measures only one phase, the value displayed may not always reveal a current problem.

Check the current on each phase (U, V, and W) with a AC clamp-on ammeter.

•The current should ramp evenly as the truck lifts.

•Current should be approx. equal for each phase. Gross differences indicate a problem.

Diagnosis and Repair

If readings are not within specified limits, perform the following steps.

1.If any one phase differs significantly from the other two, check power cable continuity. Replace cables as necessary. Refer to Power Cable Terminals on page7-52.

•If power cable continuity is OK, troubleshoot the Lift Motor. Refer to AC Motors on page5-20.

•If all phases give high readings, the lift pump may be binding. Check lift pump.

2.The LPA may be bad. Run TestO28–Lift RPM [Ramp Lift Motor] (page6-138) .

Publication: 1089040, Issued: 08 Apr 2016 6-53