Laars FT Series Installation And Operation Instructions Manual page 68

Page 68
Error Code Table (continued)
Error
Error Code Description
Code
Venting (Exhaust) Sensor
35
Open or Short
37 Abnormal Supply Frequency
Error Appears When Control
38 Stores Data, but Data is not
Saved
Gas Leakage is Detected for
40 Greater than 5 seconds, or
three times within 10 minutes
Fan Speed too High with
41
Flame On
42 LWCO Jumper Disconnected
Burner Overheat Switch
43
Open
Air Pressure Sensor (APS)
44
Fault
Air Pressure Sensor (APS)
45
Open
Fan Speed Feedback Signal
61
Abnormal
Possible Remedies
This Error Code will go away when exhaust temperature decreases.
If Error happens again:
1. Check Venting (exhaust) temperature sensor. Ensure connections are secure.
2. Check sensor resistance. If resistance is zero, replace the sensor.
3. Check vent pipes for blockage.
4. If the problem persists, contact technical support.
Supply frequency is too high to operate. This Error Code will go away when
supply frequency returns to normal operating range.
If Error happens again:
1. Ensure appliance is properly wired to a power source meeting the
requirements on the rating plate.
2. If problem persists, contact technical support.
Press the Power button to clear the Error Code.
If the problem persists, contact technical support.
IMPORTANT: If you smell gas, STOP! Follow the instructions on page 2, this
manual, and call a qualified service technician or the fuel gas utility.
Press the Power button to clear the Error Code.
If Error happens again:
1. Check the appliance cover. Ensure it is secure.
2. Check gas connections for leakage with a soapy solution. Fix any leaks.
3. Check condition of the burner assembly.
4. If the problem persists, contact technical support.
Press the Power button to clear the Error Code.
If Error happens again:
1. Check the vent connections for blockages.
2. Check the burner assembly.
3. Check fan operation. If fan appears to be operating normally but RPMs are too
high,
4. Check intake and exhuast for blockages, debris, proper installation and
placement. Check and record SFN (revision # of printed circuit board during
start-up for future reference.)
5. If the problem persists, contact technical support.
Press the Power button to clear the Error Code.
If Error happens again:
1. Ensure the LWCO Jumper is properly connected.
2. If the problem persists, contact technical support.
Press the Power button to clear the Error Code.
If Error happens again:
1. Check burner overheat switch connections. Ensure connections are secure.
2. Check switch resistance. If resistance is zero, replace the switch.
3. If the problem persists, contact technical support.
Press the power button to reset
If error happens again:
1. Check the vent pipe for blockages.
2. Check the air intake pipe for blockages.
3. inspect the Venturi and fan motor, the air intake screen at the fan connection
(for the 140 only) or the burner itself for any debris that could have been drawn in
by the fan thru the air intake.
4. If error do not clear, replace the aps
5. If the problem persists, contact technical support.
Check the aps connection.
1.If APS is closed and connections are secure, check APS connection.
2. If the problem is not happen, replace the APS
3. If the problem persists, contact technical support.
This Error Code will go away when the condition is remedied.
If Error happens again:
1. Check the connections to the fan. Ensure all are secure.
2. Check intake and exhaust for blockages and debris.
3. If the fan does not rotate during the ignition sequence, check for AC8V~26.5V
power at the fan connection. If AC8V~26.5V power is present at the control,
replace the fan. If the blower does not have AC8V~26.5V power, check power at
the control. If AC8V~26.5V power is not present at the control, replace the control.
4. If the problem persists, contact technical support.
Recover
methods
Soft Lock
Soft Lock
Hard Lock
Hard Lock
Hard Lock
Soft Lock
Hard Lock
Hard Lock
Soft Lock
Soft Lock