22
ERROR CONDITIONS
LIMIT SWITCHES
The following limit switch errors light
up individually on the heaters LCD
screen: PLENUM, HOUSING, VA-
POR, TEMP HI LIMIT.
Note: When a shutdown does
occur due to an error condition, the
amount of time elapsed since the shut-
The heater
control display
showing error
#7.
Wrong voltage.
Dip switch
#5 is the voltage
selector switch.
If dip switch #5
in "ON" that se-
lects 240 VAC.
If the unit has
only 120 VAC
applied, error 12
will show up. If
dip switch #5
is"OFF" that se-
lects 120 VAC. If
the unit has 240
VAC applied er-
ror 12 will show
up.
This is im-
portant because
if the fan heater
is set up at GSI
for 120 VAC and
the customer
connects to 240
VAC the heater
control will work,
but if allowed to
operate the so-
lenoids will have
240 VAC applied
to them which
will damage so-
lenoids.
Slave #2
inconsistent.
Same as
error 9 for slave
#1.
Slave #3
inconsistent.
Same as
error 9 for slave
#1.
1
2
3
4
5
6
Temperature
probe 2 short.
Airflow open.
Airflow short.
7
8
9
10
11
12
MISC ERROR NUMBERS
a slave controller, the master will dis-
play "SLA" on the main display and
the "RX" "TX" symbols will be flashing.
If a limit switch error or one of the
error numbers 1 through 8 occurs,
that error is displayed on the slave
where the error originates. The
master displays "SLA ERROR".
down can be viewed by pressing the
down arrow switch (up to 218 hours).
If two or more heaters are connected
together through the serial link, and
the master cannot communicate with
MULTIPLE HEATER ERROR
CONDITIONS
Note: Temperature sensor connection
-the temperature
sensor (bolt) must always be connected to the master.
(Errors 9 through 11 are displayed only if multiple heaters
are tied together through serial link).
+11 volt DC
shorted to
ground.
13
Slave #1 incon-
sistent with mas-
ter with either
the drying grain
flag or the LP
main solenoid or
cycle solenoid.
Most likely
the slave got re-
set powering up
with the sole-
noids off.
Flame probe
short error.
Illegal flame
sense.
Error 7 is
most likely
caused by stuck
open solenoid.
Error 7 will not
shut down fan
until loss of
flame is detected
by control.
Temperature
probe 2 open.
Temperature
probe 1 short.
Temperature
probe 1 open.
This indicates
that one of the
other on screen
errors (vapor,
plenum or
housing temp hi-
limit or flame out
or no airflow has
occured.
000
