Fault Detection System - Rheem GEN15S Operator's Manual

Fault Detection System

The generator may have to run for long periods of time with
no operator present. For that reason, the system is equipped
with sensors that automatically shut down the generator in
the event of potentially damaging conditions, such as low oil
pressure, high oil temperature, over speed, and other
conditions.
The generator's control panel has a digital display to show
fault codes. An extra LED indicator is installed at a
convenient inside location. The LED will turn on and off in a
series of blinks if certain problems are detected in your HGS.
The blink pattern is repeated with a brief pause between each
series. The fault code as shown on the control panel, and the
number of blinks on the mounting plate, indicates the
detected fault and as follows:
Fault Codes / LED Flashes
FC_1 / 1
FC_2 / 2
FC_3 / 3
FC_4 / 4
FC_5 / 5
FC_6 / 6
FC_7 / 7
FC_8 / 8
Reset Fault Detection System
The operator must reset the fault detection system each time
it activates. To do so, place the system switch in the OFF
position for 5 seconds or more. Return the Home Generator
System to service after correcting the problem by placing the
system switch in the AUTO position.
A description of each fault and suggested remedies are as
follows:
No LED - Discharged Battery
This condition is caused by a completely discharged battery.
To remedy the problem, remove the 15 Amp fuse and
disconnect the battery from the generator. Take the battery to
a local battery store for analysis.
Replace the battery after it has been fully recharged,
connecting the NEGATIVE cable last. Install the 15 Amp fuse.
14
Fault Description
Low battery voltage
Low oil pressure
Low voltage
Engine fail to start
Low frequency
Engine overspeed
Oil temperature high
Transfer switch fault
Low Battery Voltage
This fault is indicated by fault code FC_1 and one blink on
the LED indicator. This condition occurs if the generator
cannot start because the starting battery output power is
below that needed to crank the engine. Causes for this
problem may be a faulty battery or trickle charger circuit.
To remedy the problem, contact your local service center to
check the battery trickle charge output. Remove the 15 Amp
fuse and disconnect the battery from the generator. Take the
battery to a local battery store for analysis.
Replace the battery after it has been fully recharged,
connecting the NEGATIVE cable last. Install the 15 Amp fuse.
Low Oil Pressure
This fault is indicated by fault code FC_2 and two blinks on
the LED indicator. The unit is equipped with an oil pressure
switch (Figure 4) using normally closed contacts that are
held open by engine oil pressure during operation. Should oil
pressure drop below the 8 psi range, switch contacts close
and the engine is shut down.
15kW
Oil
Pressure
Switch
Oil Drain
Fitting
12kW
Oil
Pressure
Switch
Figure 4 — Low Oil Pressure & High Temp. Switches
To remedy the low oil pressure condition, add the
recommended oil to the FULL mark on the dipstick.
If low oil pressure condition still exists, engine will start,
then shut down after about 20 seconds and diagnostic LED
will flash. In this case, contact an authorized service facility.
High
Temperature
Switch
High
Temperature
Switch
Oil Drain
Fitting