38
Cause
：
Main contactor coil driver shorted
Solution ways
：
A) Check the cathnode of main contactor coil
（
AMP saab type, on CNA#17end, AMP seal type, on
CNA#12 end
）
whether shorted with the battery cathode or not.or if connected with a lower resistance
value or not.
。
B) Drive circuit of controller damaged,need to change.
8
）
“CONTACTOR DRIVER” Contactor driver is damaged.
Cause
：
Main contactor coil of driving circuit can't drive loads
。
May be contact device itself or its driving
circuit is damaged.
This fault type has no relationship with external constitute,replace the controller.
9
）
“CONTACTOR OPEN ” Contactor disconnection.
Cause
：
Controller drive main contactor coil, but contactor switch has no closing
。
Solution
：
Maybe the main contactor point of contact fault,which causes contact device does not work,
replace main contactor
10
）
“CONTACTOR CLOSED”
Cause:before drive main contactor coil, check if controller contactor detection is normal or not. Then
controller will drive power bridge 10 subtles in order to discharging the electric quantity of power. If no
discharge shows failure
。
Solution
：
Check the connection between the mian contactor and power unit.replace the main contactor .
11
）
“AUX DRIVER SHORTED”
Cause
：
Drive circuit of electric braking coil shorted.
Solution
：
A) Detection of negative electromagnetic brake coil
（
AMP saab type , on the end of CNA#31, AMP seal
type,on the end of CNA#4
）
,check if it has shorted with battery cathode or not.
B) Controller driving circuit is damaged, replace controller
12
）
“AUX DRIVER OPEN” open circuit of auxiliary coil drive
Cause
：
Electromagnetic brake coil driver can't drive loads
Solution
：
replace the controller
13
）
“POS AUX SHORT ” positive electrode of auxiliary coil shorted.
When the bat-handles switch and soft/hard has broken
，
SMART instrument output high level to positive
electromagnetic brake coil.
Solution
：
A) Check the output first
，
the purpose is to check if solenoid valve anode has matched with the SMART
instrument output.
（
AMP saab type, on the end of CNA#30, AMP seal type,on the end of CNA#2
）
B) If smart instrument don’t connect with adapting piece. but output is always high level, that is means
controller and smart instrument may shorted
14
）
“LOGIC FAILTURE#1” logic card fault#1
When the controller detected overvoltage or undervoltage will be display fault.limitation of overvoltage
