INSTRUCTION MANUAL
21
The engine starts and stops
– Dirty fuel filter element.
– Restriction in air filter/cleaner or induction system.
– Air in fuel system.
The engine shuts down after approximately 15 seconds
– Bad connection towards oil pressure switch/coolant temperature
switch.
– DIP switch on back of module wrong positioned.
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The engine control circuit diagrams and the power circuit diagrams
for the standard QAS28 unit, for the units with options and for the
units with combined options are:
Unit Power circuit Engine control circuit
QAS28 Yd (standard unit) 9822 0888 21 9822 0888 27
QAS28 Yd RS 9822 0888 21 9822 0888 28
QAS28 Yd DF 9822 0888 21 9822 0888 27
QAS28 Yd SF 9822 0888 21 9822 0888 27
QAS28 Yd DV 9822 0888 26 9822 0888 27
QAS28 Yd DV-SW 9822 0888 26 9822 0888 27
QAS28 Yd AMF 9822 0888 21 9822 0888 29
9822 0773 55
QAS28 Yd DV DF RS 9822 0888 26 9822 0888 28
QAS28 Yd 1PH 9822 0888 99 9822 0888 27
QAS28 YdS 9822 0888 21 9822 0888 27
QAS28 YdS SF 9822 0888 21 9822 0888 27
QAS28 YdS RS 9822 0888 21 9822 0888 28
QAS28 YdS IT 9822 0888 22 9822 0888 27
QAS28 Yd IT RS SF 9822 0888 22 9822 0888 28
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The following “electrical” options are available for the QAS28
unit:
– outlet sockets (S).
– remote start (RS).
– automatic mains failure (AMF).
– single frequency with electronic speed control (SF).
– dual frequency with electronic speed control (DF).
– dual voltage (DV).
– dual voltage with switch (DV-SW).
– single phase (1 PH).
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The “Outlet sockets” option provides the following extra outlet
sockets and circuit breakers:
X2 ......3-phase outlet socket (400 V AC)
Provides phases L1, L2 and L3, neutral and earthing.
X3 ......3-phase outlet socket (400 V AC)
Provides phases L1, L2 and L3, neutral and earthing.
X4 ......1-phase outlet socket (230 V AC)
Provides phase L3, neutral and earthing.
Q2......Circuit breaker for X2
Interrupts the power supply to X2 when a short-circuit occurs
at the load side, or when the overcurrent protection (32 A) is
activated. When activated, Q2 interrupts the three phases to-
wards X2. It can be activated again after eliminating the prob-
lem.
Q3......Circuit breaker for X3
Interrupts the power supply to X3 when a short-circuit occurs
at the load side, or when the overcurrent protection (16 A) is
activated. When activated, Q3 interrupts the three phases to-
wards X3. It can be activated again after eliminating the prob-
lem.
Q4......Circuit breaker for X4
Interrupts the power supply to X4 when a short-circuit occurs
at the load side, or when the overcurrent protection (16 A) is
activated. When activated, Q4 interrupts phase L3 and the neu-
tral towards X4. It can be activated again after eliminating the
problem.
When the sockets-option is installed, circuit breaker
Q1 does not only interrupt the power supply
towards X1 but also towards X2, X3 and X4.
Make sure to switch on circuit breakers Q1, Q2, Q3,
and Q4 after starting the generator when power
supply is done by means of X2, X3 or X4.
X2
X3
X4
S2
X1
L1 L2 L3 N
PE
Q1 Q2 Q3 Q4
K4
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