SANY SCC1000C - Troubleshooting Guide

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Section 1 Maintenance
SCC1000C Crawler Crane — Maintenance Manual
Table 5-15 Troubleshooting Guide - Engine
16 Troubleshooting Guide
No� Problem Cause Solution
1
Start motor has
no response
when the
engine is
ignited.
1. The fuse 23F13 is open circuit. 1. Replace the same capability fuse.
2. The starter motor has fault. 2. Replace the starter motor.
3. 5 KM3 has fault. 3. Replace the contactor.
4. U1 is damaged. 4. Replace the U1 controller.
5. Communication failure in U1 and
U2.
5. Check the CAN Bus for U1.
6. Low battery voltage. 6. Charge or replace the battery.
7. Engine rotational speed sensor
fault (In non-starting status, reading of
engine rotational speed excesses 900
rpm).
7. Replace the rotational speed sensor
8. Seat interlock switch fault.
8. Check the seat interlock switch for
correct function. check related wirings for
correct function.
9. Function locking switch fault.
9. Function locking switch fault or function
locking lever is set at the working position.
2
Engine is
difcult to start
or cannot start
(with smoke
emitted)
1. Fuel level is low. 1. Refuel.
2. Low battery voltage. 2. Check the battery and power supply circuit.
3. Rotational speed of the engine is
slow.
3. If the engine’s rotational speed is less than
150 rpm, refer to the engine symptom tree.
4. Vehicle additional power is too high. 4. Check whether it can be started with load.
5. Fuel leakage.
5. Check whether fuel pipe, fuel pipe
connector, or fuel lter leaks.
6. Resistance of air intake system
exceeds the value stipulated by
technical specication.
6. Check resistance of air intake system. If
necessary, clean or replace air filter and air
intake pipe.
7. Fuel grade differs from applicable
type or fuel quality is inferior with
impurity.
7. Use the correct fuel to fulfill the
requirements.
8. Fuel lter is blocked.
8. Measure fuel pressure at fuel lter’s intake
and outlet.
9. Fuel supply is not enough.
9. Check fuel ow through the lter to nd out
where the fuel is blocked.
10. Fuel pump has fault.
10. Check whether the fuel pump runs
normally. check output pressure of the pump.
If necessary, replace fuel pump.
11. Position of throttle lever is wrong.
11. Check and adjust the position of the
throttle lever.
12. Cannot work normally due to cold
weather.
12. Check, repair or replace starting
assisting device for cold weather.
13. Fuel system has air inside.
13. Release air from fuel system and
check the fuel suction pipe for air leakage.
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