11-11
TABLE 11-1. TROUBLESHOOTING GENSET FAULTS (CONT.)
@@@@ Some genset service procedures present hazards that can result in severe personal
injury or death. Only trained and experienced service personnel with knowledge of fuels, electricity,
and machinery hazards should perform genset service. See Safety Precautions.
Accidental or remote starting can cause severe personal injury or death. Before removing a panel or
access door, disconnect the negative (–) cable from the battery to prevent the engine from starting.
WARNING
FAULTY TEMPERATURE SENDER—CODE NO. 24
Control Logic:
Controller sensed open sender
Corrective Action:
Refer to Pages A-1 through A-3 as appropriate.
1. If loose, tighten the ring terminal on sender
E2
(Page 9-6). If it is an isolated-ground sender, also make
sure and the flag terminal is connected to terminal
2
on the sender.
2. Disconnect connector
P1
(black) from genset controller (Page 9-1) and check continuity between
Pin 9
and ring terminal
E2-1
. If it is an isolated-ground sender, also check continuity between
E2-2
and
B–
(ground). Repair wiring and connectors as necessary.
3. Test sender
E2
and replace as necessary (Page 9-6).
4. Replace the genset controller (p. 9-1).
LOSS OF AC VOLTAGE SENSE—CODE NO. 27
Control Logic:
The genset Controller lost VAC sensing during normal voltage regulation when
the field was functioning normally and frequency was at least 40 Hz
Corrective Action:
Refer to Pages A-1 through A-3 as appropriate.
1. Disconnect connector
P3
(green) from the genset controller (p. 9-1) and check continuity between
Pin 11
(S1) and
Pin
12
(S2). If open, check for missing, bent or corroded pins and faulty wiring and re-
pair as necessary.
2. Service or replace the brush block, slip rings, rotor or stator as necessary (Section 8).
3. Replace the genset controller (p. 9-1).
HIGH BATTERY VOLTAGE—CODE NO. 29
Control Logic:
During startup the genset Controller sensed that battery system voltage was greater than
19.2 volts
Corrective Action:
1. Check battery bank connections and reconnect if necessary for 12 volts.
2. Select a lower battery booster charge rate.
CONTROL CARD FAILURE–EE—CODE NO. 35
Control Logic:
During startup the genset Controller detected a EE memory error
Corrective Action:
Replace the genset controller (p. 9-1)
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Summary of Contents for MDKBH Series
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