PLANAR
Edition 1
March 2016
Page. 9 of 29
Table2
Fault
Code
Description
Fault Cause
Recommended Solutions
27
Motor does
not rotate
Damaged bearing or rotor,
foreign objects, etc.
Check connectors and wiring
leading to the electric motor board
and the control unit. Eliminate the
fault, if possible.
(see item 5.6)
28
Motor rotates.
Speed is not
regulated.
Faultyelectric motor control
boardor heater CU.
Replace air blower.
08
or
29
Flame failure
during
operation of
the heater.
Insufficient fuel supply.
Faultyfuel pump.
Faulty flame indicator.
Check for leaks or clogging of fuel
lines, tighten the clamps on the fuel
lines. Check combustion air intake
and exhaust pipe. Check the amount
of fuel supplied by the fuel pump,
and replace it if necessary.
(see item 5.10)
If the heater starts, check flame
indicator and replace it if needed.
(see items 5.3 or 5.5)
30
Heater does not
start
No communication between
the controller and the
control unit.
Control unit receives no
data from the controller.
Check connectors and white wire in
the connecting harness.
Remove oxidation of connectors.
Check controller and connecting
harness, replace if necessary.
If controller is operational,
replace control unit.
31
Overheating
of hot air
outlet
temperature
sensor.
Planar 8DM
on
Hot air temperature sensor
gives a signal to turn off
the heater.
Checkthe temperature sensor
(item 5.4)
only PLANAR-8DM