Weil-McLain Aqua Balance WMB-155 Manual page 90

W
TM
AquaBalance
34 Troubleshooting
Figure 114
Troubleshooting suggestions — Fault displays and diagnostics
Fault
Code Fault
F13 Exhaust probe fault
F14 Delivery sensor 2 fault
F15 Fan fault
F27
Flue temp
F34 Supply voltage under 100V
F35 Faulty voltage frequency
F37 Incorrect system water
pressure
F39 Outdoor sensor fault
A16 Outdoor sensor fault
A26 System installation
A41 Sensor positioning
A42 Heating sensor fault
A44 Temp sensor
Exchanger protection acti-
F43
vation.
F51 Low water
F52 Heating sensor fault
F53 Temp sensor
A61 Controller ABM08A fault
No communication between
A62
controller and gas valve
A63
F64
Controller ABM08A fault
A65
F66
A23
A24
F20
Card parameter fault
F21
F40
F47
*
Boiler water pressure switch is set for 9 psi (±2) minimum pressure.
90
M -
ALL OUNT GAS FIRED WATER BOILER
(continued)
Condition
Probe damaged
Wiring shorted
Wiring disconnected
Sensor damaged
Wiring shorted
Wiring disconnected
No 120V power supply
Tachometric signal interrupted
Fan damaged
Condensate rap blocked and or con-
densate drain hose looped making a
second trap.
Exhaust gas temp too high
Electric voltage trouble
Electric voltage trouble
* Pressure too low < 8 psi
Water pressure switch damaged or not
connected
Check Heating Only boiler primary loop
pump, must pump towards return side
of boiler.
Sensor damaged or wiring shorted
Sensor disconnected after activating the
sliding temperature
Outdoor sensor is not connected
F40 Error repeated 3 times in 1 hour
Supply sensor disconnected from pipe
Sensor damaged
Te m p s e n s o r n o t c o n n e c t e d o r
badly connected to pipe (DHW mode)
No system H2O circulation
Air in the system
Low water fault
Sensor damaged
High limit thermostat error
Controller ABM08A internal error
Controller not connected
Valve damaged
Controller ABM08A internal error
Wrong card parameter setting
—
Boiler Manual
(continued)
Correction
Check the wiring or replace the exhaust
probe
Check the wiring or replace the sensor
Check the 8-pin connector wiring
Check the 8-pin connector wiring
Check the fan
Check the trap and clean it if necessary
Also inspect gas valve, blower, venturi, igniter,
and heat exchanger, and replace those with
signs of damage.
Make sure correct vent material was
selected (Parameter List 165)
Check the electrical system (Can't have
more than 1 pump wired to boiler
Check the electrical system
Fill the system
Check the sensor
Check pump location and pump water direc-
tion
Check the wiring or replace the sensor
Reconnect the outdoor sensor or disable the
sliding temperature
Check the sensor
Check the water pressure in the system
Check the correct positioning and operation
of the heating sensor
Replace the sensor
Check the sensor
Check the circulating pump
Vent the system
Check boiler installation and water level
Replace the sensor
Check the sensor. Check boiler installation
Check the ground connection and replace the
controller if necessary.
Connect the controller to the gas valve
Replace the valve
Check the ground connection and replace
the controller if necessary.
Check the card parameter and modify it if
necessary.
Part number 550-100-305/0118