Model 4700 Maintenance Manual
Section 6. Messages and Codes Fault Codes
Refer to the “Pinout Matrix” located in Theory of Operation section for all voltage and resistance values and component interconnection. Code
Description
Notes/Corrective Action
39
Code 39: PPA Internal Fault Failure of the current sensor.
Check cables to the motor and PPA for continuity and correct torque. If OK, replace the PPA.
40
Code 40: PPA Precharge Failure When CT2 is closed, the PPA attempts to charge the internal capacitors. If the capacitors are not charged to B+ in a certain amount of time, this code is displayed.
Check for B– at the PPA power input. Check for B+ from CT2 to the B+ connection on the PPA. If not present, check the fuse for the PPA (FP). Measure voltage and resistance across CT2 coil. If OK, replace the PPA.
41
Code 41: PPA Overtemperature Internal temperature of the PPA is >167°F (75°C). Performance is reduced to 212°F (100°C); travel and lift is shut down above 212°F (100°C).
Check fan for correct operation. Fan should operate within about one minute after turning Key switch ON. If not, troubleshoot fan. Allow PPA time to cool. If code clears, check cables to pump motor and PPA for continuity and correct torque. If code does not go away, replace the PPA.
42
Code 42: Pump Motor Temperature Out-of-Range Pump motor overtemperature, >266°F (130°C), or temperature switch bad.
If motor temperature is <266°F (130°C), check wiring to switch. If motor temperature is >266°F (130°C), compare current across the 3 phases for excessive current draw per the Pinout Matrix. If OK, replace the PPA. Note: Temperature is reported to VM in Single Traction Motor Trucks.
43
Code 43: Pump Motor Encoder Error Incorrect or no input seen by the PPA from the pump motor encoder. This code can also be caused by a lack of power to the PPA when there is a pump request.
Test the +12V and GND inputs to the encoder and the output from channels A and B to amplifier. If OK, check for shorts to frame. Check voltage to PPA. If OK, replace the PPA.
44
Code 44: PPA Temperature Sensor Out-of Range
Check fan for correct operation. Fan should operate within approx. one minute after turning key ON. If not, troubleshoot fan. If OK, replace the PPA.
45
Code 45: Amplifier Enable No B– input seen by the PPA.
Check for B– at the PPA power input. Make sure gray jumper wire is connected between JFP-5 and 11. Check voltage from JFP-5 wrt 11. Replace PPA.
Publication 1160093, Issued: 20 May 2013
6-15
