60
WHL-032 REV. 6.2.16
Er:85
Freeze Protection
(Boiler has detected
water temperature
below 34
o
F (1
o
C)
This Error Code will go away when the freezing condition is remedied.
If Error happens again:
1. Ensure boiler is located in a mechanical room protected from freezing conditions.
2. Ensure all valves are open to the boiler, 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, replace the main control.
Er:94
Exhaust Sensor
detects Vent
Temperature is
Greater than 190
o
F
(88
o
C)
This Error Code will go away when the condition is remedied.
If Error happens again:
1. Check if dip switch High 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, replace the control.
6. If the problem persists, replace the heat exchanger.
Table 25
– Error Codes with Linked Components, Effects, and Actions
DIAGNOSTICS AND SUGGESTED CORRECTIVE ACTIONS
The table below includes diagnostic information and possible corrective actions.
Display
Condition
Diagnostic
Possible Corrective Actions
Nothing appears on
the display control
panel but the blower
runs at full speed
Control is not
receiving power
Check wiring for short circuit or
incorrect wiring
Correct wiring per wiring diagram including
connection of transformer to the control
Check transformer connection to the
control per wiring diagram. Check for
12V output of transformer
Replace transformer if it is receiving 120V, but
not outputting 12 VAC
Nothing appears on
the display control
panel and no other
boiler components
are operating
Control is not
receiving 120V
power
Ensure service switch and/or circuit
breaker to boiler is turned ON
Turn on service switch or circuit breaker to
power boiler
Is there 120V at the service switch
Troubleshoot and correct the power supply to
the manual switch
Is the ON/OFF switch inside the
boiler cabinet is turned on
Turn ON the manual power switch inside the
boiler cabinet
Check for 120V at the line voltage
terminal block located inside the
boiler cabinet
Correct wiring inside the boiler cabinet using
the wiring diagram in the installation manual
Inspect the fuse. Replace as
necessary
Replace the fuse with the proper part found in
the replacement part section of this manual. If
fuse blows again, recheck the wiring per
diagram
Nothing appears on
the display control
panel, but the boiler
is operating
Occurs when
communications is
lost from the control
to the display
Check for loose connections and
proper pin alignment / engagement
on the control’s plug
Check for continuity on the wire harness from
the display to the control. See repair parts
section for proper replacement part.
Cycle power off and on using boiler
power switch and check for operation
Replace with new display module. See repair
parts section for proper replacement part.
Display repeatedly
goes through
initialization
sequence
Occurs when control
does not receive
signal from fan
Cycle power off and on using
appliance power switch and check for
operation
Replace fan.
Table 26
–Diagnostics and Suggested Corrective Actions
I. SETTING UP A CASCADE SYSTEM
When setting up a cascade system, each individual boiler control must be programmed for cascade operation.
Program the Master and Follower Boilers:
To program the cascade system, first enter the Installer Mode. Scroll down to and select the following parameters on each boiler in the
system:
1.
28:cP
– Set the number of units in the cascade loop [range from 1-20].
2.
27:cn
– Next, set the cascade address (Master should always be addressed 0) [range from 0-19]. 27:cn cannot be changed until
28:cP is set.
NOTE:
The above parameters should be set on every unit in the cascade loop. To remove a follower from the cascade system, the
Master display panel power needs to be turned off, or the cascade cable needs to be disconnected from the unit that is being
removed from the cascade system.
