Laars FT Series Installation And Operation Instructions Manual page 69

The FT Series Heating Only, Boiler
Error
Error Code Description
Code
Register, Ram, Rom, I/O
Port, AD Abnormal, Important
70
EPROM Data or Safe Data
Abnormal
Flame Signal Detected before
72
Ignition
Poor Communication
76
(Control Display)
77 Outdoor Sensor Error
78 Cascade Error
Low Water Level Sensor
80 (Low Water Level Detected
Four (4) Consecutive times)
81 Low Water Level Circuit
Freeze Protection
(Appliance has detected
85
water temperature below
34°F(1°C)
Exhaust Sensor detects Vent
94 Temperature is Greater than
190oF (88oC)
This Error Code will go away when the condition is remedied.
If Error happens again:
1. Turn power OFF and ON at the main power switch internal to the appliance.
2. 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 appliance cover. Ensure it is secure. Flame detection sensor can detect
an external light source.
2. Look thru boiler sight glass and check for glowing after burner shutdown, if so, do
step 3.
3. Check burner plate by removing blower and boiler top plate and remove any debris
from top of burner plate. Debris can come from PVC shavings during intake installation
and/or from nearly dryer vents and landscapers causing debris pulling in thru air intake.
Debris can glow after burner shut-down.
4. Check flame detection sensor. Ensure connections are secure. Normal operating
settings are more than 2.5DC before ignition, less than 2.5DC after ignition.
5. If the problem persists, contact technical support.
This Error Code will go away when the condition is remedied.
If Error happens again:
1. Check connections from main control to display panel.
2. If the problem persists, replace the display and/or contact technical support.
1. Check outdoor sensor wiring and make sure all connections are proper and secure.
2. Check resistance of outdoor sensor. If resistance is zero, replace sensor.
3. If the problem persists, contact technical support.
Please refer to Manufacturer's Document 1349 for Cascading the FT.
This Error Code will go away when the condition is remedied.
If Error happens again:
1. Ensure all valves are open to the appliance and there are no leaks.
2. Ensure all air has been purged from the system.
3. Check wiring connections to low water level sensor. Ensure all are secure.
4. Check low water level sensor resistance. If resistance is zero, replace the sensor.
5. If the problem persists, contact technical support.
This Error Code will go away when the condition is remedied.
If Error happens again:
1. Ensure all valves are open to the appliance and there are no leaks.
2. Check wiring connections to low water level sensor. Ensure all are secure.
3. Check low water level sensor resistance. If resistance is zero, replace the sensor.
4. If the problem persists, contact technical support.
This Error Code will go away when the freezing condition is remedied.
If Error happens again:
1. Ensure appliance is located in a mechanical room protected from freezing conditions.
2. Ensure all valves are open to the appliance, there are no leaks.
3. Check wiring connections to low water level sensor. Ensure all are secure.
4. Check low water level sensor resistance. If resistance is zero, replace the sensor.
5. If the problem persists, contact technical support.
This Error Code will go away when the condition is remedied.
If Error happens again:
1. Check if dip switch Max Fire setting is ON. Switches 6 and 7 should be OFF for
normal operation.
2. Check exhaust temperature sensor. Ensure connections are secure.
3. Check sensor resistance. If resistance is zero, replace the sensor.
4. Check exhaust vent for blockage.
5. If the problem persists, contact technical support.
Possible Remedies
Page 69
Recover
methods
Soft Lock
Soft Lock
Soft Lock
Soft Lock
Soft Lock
Soft Lock
Soft Lock
Soft Lock