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Freeze Protection
Er:85
(Boiler has detected
water temperature
below 34
Exhaust Sensor
detects Vent
Er:94
Temperature is
Greater than 190
o
(88
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
Nothing appears on
the display control
panel but the blower
receiving power
runs at full speed
Nothing appears on
the display control
panel and no other
boiler components
are operating
Nothing appears on
the display control
communications is
panel, but the boiler
lost from the control
is operating
Display repeatedly
Occurs when control
goes through
does not receive
initialization
sequence
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:
28:cP – Set the number of units in the cascade loop [range from 1-20].
1.
27:cn – Next, set the cascade address (Master should always be addressed 0) [range from 0-19]. 27:cn cannot be changed until
2.
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.
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.
o
o
F (1
C)
3. Check low water level sensor resistance. If resistance is zero, replace the sensor.
4. If the problem persists, replace the main control.
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.
o
F
4. Check exhaust vent for blockage.
C)
5. If the problem persists, replace the control.
6. If the problem persists, replace the heat exchanger.
Condition
Check wiring for short circuit or
Control is not
Check transformer connection to the
control per wiring diagram. Check for
Ensure service switch and/or circuit
breaker to boiler is turned ON
Is there 120V at the service switch
Is the ON/OFF switch inside the
Control is not
receiving 120V
Check for 120V at the line voltage
power
terminal block located inside the
Inspect the fuse. Replace as
Check for loose connections and
Occurs when
proper pin alignment / engagement
Cycle power off and on using boiler
to the display
power switch and check for operation
Cycle power off and on using
appliance power switch and check for
signal from fan
Diagnostic
incorrect wiring
12V output of transformer
boiler cabinet is turned on
boiler cabinet
necessary
on the control's plug
operation
Possible Corrective Actions
Correct wiring per wiring diagram including
connection of transformer to the control
Replace transformer if it is receiving 120V, but
not outputting 12 VAC
Turn on service switch or circuit breaker to
power boiler
Troubleshoot and correct the power supply to
the manual switch
Turn ON the manual power switch inside the
boiler cabinet
Correct wiring inside the boiler cabinet using
the wiring diagram in the installation manual
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
Check for continuity on the wire harness from
the display to the control. See repair parts
section for proper replacement part.
Replace with new display module. See repair
parts section for proper replacement part.
Replace fan.
WHL-032 REV. 6.2.16
60
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