Page. 6 of 29
March 2016
Edition 1
PLANAR
Table2
Fault
Code
Description
Fault Cause
Recommended Solutions
01
Overheating of
the heat
exchanger
The sensor sends a
signal to shut down the
heater. Heat exchanger
temperature in the
sensor zone is over
250°C
Check the intake and outlet of the
heating unit for unobstructed entry
and exit of heated air.
Check the integrity of the fan and its
performance.
Check the temperature sensor and
replace it if necessary.
(see items5.3-5.4)
Inspect the heat exchanger.
Check and remove carbon deposits
from the inside of the heat exchanger,
if necessary (see items5.8-5.9)
02
Possible
overheating at
the intake
temperature
sensor. Sensor
temperature
(control unit) is
more than 55
degrees.
Control unit is
insufficiently cooled
down during 5 min.
purging before startup; or
overheating of the
control unit during
operation.
Check the intake and outlet of the
heating unit for unobstructed entry
and exit of air and re-start the heater
to cool it down.
Replacethe control unit.
(see item5.7)
05
Faulty temperature
sensor
(PLANAR-2D)
or flame indicator
Short circuit to the casing
or open circuit in the
wiring of the sensor.
Check sensor as in5.3
or5.5,replace if necessary
04
or
06
Faulty
temperature
sensorin the
control unit
Temperature sensor out of
order (located in the
control unit, cannot be
replaced)
Replace control unit
(see item5.7)
07
Overheat
sensor- open
circuit
Faulty sensor. Oxidation
of contacts in the terminal
block.
Check overheat sensor circuit
for an open. Remove oxidation
from the connector contacts.
08
See Fault Code29.
09
Faulty glow
plug
Short circuit, open
circuit, faulty control
unit.
Checkglow plug, replace if necessary.
(see item5.1)
Check the control unit, replace if
necessary.
(see item5.7)
