23
12
．
1 Adjustment methods of safety valve pressure
The pressure of safety valves has already been
adjusted when the truck is ex-factory. Users shall
not adjust the pressure at will. Otherwise it will
bring danger to the truck’s hydraulic system and
safety. If the oil pressure is not in accordance
with specified value, please ask the professional
personnel to adjust according to the test methods
stipulated in the JB/T3300 standards as well as
the following methods:
1 Screw out high pressure oil tube and install
pressure meter with capacity over 20Mpa at
the high pressure oil outlet.
2 Press lifting operation button to measure the
system pressure. The stipulated system pressure
is 16Mpa for truck with rated load of 1500KG and
16.5 Mpa for truck with rated load of 2000KG.
3 If oil pressure is not in accordance with the
specified value, please loosen locknuts of the overflow valves. Turn pressure screw left and right until the
pressure reaches the specified value. When the screw is turned clockwise, the system pressure increases.
While the screw is turned counter-clockwise, the system pressure
decreases.
4 After the adjustment, please screw down the locknuts.
13
．
Common fault signal and troubleshooting
NO Programmer
display
c o d e f a u l t
T r o u b l e s h o o t i n g
1
BATTERY
DISCONNECT
FAULT
4.5
The battery is not
connected
1)
T h e b a t t e r y i s n o t c o n n e c t e d
2)
P o o r c o n t a c t i n t h e b a t t e r y
t e r m i n a l s
2 BRAKE OFF FAULT 3.4
Close brake failure
1)
E l e c t r o m a g n e t i c b r a k e c o i l i s
s h o r t c i r c u i t
2)
E l e c t r o m a g n e t i c b r a k e d r i v i n g
i s o p e n c i r c u i t
3 BRAKE ON FAULT
3.2 Brake failure to open
1)
E l e c t r o m a g n e t i c b r a k e d r i v i n g
i s o p e n c i r c u i t
3)
E l e c t r o m a g n e t i c b r a k e c o i l i s
s h o r t c i r c u i t
2)
4 CURRENTSENSE
FAULT
4. 1 Current detection fault
1)
M o t o r o r m o t o r w i r i n g s h o r t e d
2)
C o n t r o l l e r f a u l t
5
EEPROM
CHECKSUM FAULT
4.3 EEPROM f a u l t
1) EEPROM Failure or malfunction
6 HARDWARE
FAILSAFE
4.2 Over voltage of motor
1 ) M o t o r v o l t a g e d o e s n o t m a t c h t h e
a c c e l e r a t o r i m p u t
1)
M o t o r o r m o t o r w i r i n g s h o r t e d
2)
C o n t r o l l e r f a u l t
Locknut
Pressure
adjusting
screw
