TM 5-6115-434-12
Table 3-5. Sequence of events during performance check-Continued
Step
Condition
Power unit Indication
Adaptor indication
Remarks
4
Power unit instru-
Starter rotates engine.
If not, start relay (K1)
ment panel mas-
contacts failed, or
ter switch (S1)
starter motor (B1)
in START posi-
failed.
tion-Continued
Turbine hold relay
If not, turbine hold
(KS) actuates, fuel
relay (K3) failed, or
boost pump runs.
fuel boost pump
failed..
5
Release power
Starter continues to
If not, start relay (K1)
unit control
rotate engine.
holding contacts
panel master
failed or time delay
switch to
relay (K4) actuates
RUN position.
too soon (60 sec.
time delay).
Caution
The analyzer start switch and motor rotate switch bypass the multispeed centrifugal switch
assembly 35 percent switch.
KS, and/or K4 lamps
Time delay relay (K4)
extinguished.
contacts failed, or
turbine hold relay
(K3) failed
Fuel boost pump con-
If not, turbine hold
tinues to run.
relay (KS) contacts
failed.
6
Unit reaches
Fuel solenoid valve
Fuel lamp illuminates.
If not, no oil pressure,
approximately
opens.
or oil pressure se
10 percent
quencing switch failed.
governed
If not, fuel solenoid
speed, oil
valve failed
pressure se-
quencing
switch actuates.
Note
Fuel switch on analyzer will not interrupt power to solenoid.
Ignition lamp illumi-
If not, centrifugal
nated.
multi-speed switch
assembly 95 percent
switch failed, or under
frequence arming
relay (K6) contacts
failed.
Ignition on. (Listen
If not, ignition unit
for audible cracking
failed.
sound of ignition.)
Fuel flows through
primary fuel atomizer
(flow divider blocks
secondary flow).
7
Engine lights
Exhaust gas temperature
If not, improper acceler-
off.
Increases.
ation limiter valve
crack pressure, im-
proper fuel spray
(Atomiser-flow
Divider), or ob-
structed air flow
through engine
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