© 2022 Staheli West
140
Faults
Fault 29: Lockout ILK (Airflow Switch / VFD)
Indicates that the
VFD/fan motor did not turn on or the airflow switch did not detect the fan air moving.
*TROUBLESHOOTING TIP: To manually start the fan motor, latch the CR-1 relay on Panel 1 (generator must
be running).
Causes
Troubleshooting
Fixes
• Clogged
airflow switch/hoses.
• Check the airflow switch and
hoses for obstructions.
• Clean out hoses.
• Remove obstructions.
• Remove and clean sensor air
inlet port.
• Adjust the 90° Elbow to the
rear of the machine away from
the airflow to prevent future
clogs.
• Faulty VFD.
• Latch CR-1 relay (Panel 1) to
manually start the VFD and fan
motor.
• Watch VFD LCD screen as the
fan motor starts; It should ramp
from 0-60 over 15 seconds.
• Replace VFD.
•
Airflow switch out of
adjustment.
• Fan is spinning but airflow
switch is not tripped.
• Adjust airflow switch to most
sensitive setting (0.4).
• Circuit breaker is tripped.
• Check circuit breaker (Panel 1).
• Reset fan motor circuit breaker
(Panel 1).
• Over greased fan motor.
• Has the fan motor been over
greased? (1 pump per year)
• Replace fan motor.
• Failed fan motor.
• Check for 3 phase power
reaching fan motor.
• The fan should be able to spin
freely.
• Replace fan motor.
• Faulty CR-1 relay (Panel 1).
• Latch CR-1 relay to “ON”.
• Replace CR-1 relay.
• Faulty CR-2 relay (Panel 1).
• Applicable to 2015 machines.
• Latch CR-2 relay to “ON”.
• See Test 98 CR-2 Removal.
• Faulty/Non-programmed VFD.
• Watch VFD LCD screen as the
fan motor starts; It should ramp
from 0-60 over 15 seconds.
• Program the VFD (See Test 14).
• Replace VFD.
• Low supply voltage to VFD.
• Check for 120 V on L1 and L2 of
VFD.
• Repair faulty wiring or cause of
low voltage.
• Faulty wiring.
• Inspect the wiring for ground,
continuity, and proper voltage.
• Replace/Repair wiring.
Fault 30-44
• Check wiring behind the burner controller.
• Replace the burner controller if fault persists.
