7
Service and Troubleshooting
Last Fault Display: When the control is reset from a lockout
condition, if the burner resumes normal operation, the screen
will toggle the last fault and its cause for five days (longer du-
ration if control is not wired for constant power). This feature
is designed to allow the service technician to easily see what
caused the condition in the event the homeowner reset the
control prior to his arrival. The screen will alternate between
displaying what the last fault was and displaying how to clear
the message hold ESC for 3 seconds.
Display Voltage and Current: Press + for 3 seconds to
display real time voltage and current.
Lockout: If lockout occurs, the screen turns on, the fault icon
flashes and a fault message is displayed on the screen. To
Reset Push in and hold the red Reset button for 1 second,
then release. NOTE: Recycling power to the control will not
reset it from it from a lockout condition.
Two fault conditions result in an immediate lockout. These
include; Flame detected during pre-purge and flame failure
during Trial for Ignition. All other faults will result in a Recycle
(unless the Allowed Recycles is set to ‘None’ in the Set-up
Menu). A Recycle results in the burner shutting down for 60
seconds then resuming operation in Standby (if there is no
Call for Heat) or initiating the Operating Sequence above (if
there is a Call for Heat).
Latch-up: If the control locks out 3 times during a single Call
for Heat, Latch-Up will be displayed on screen.
To Reset the control after latch-up, press and hold the red
Reset button for 30 seconds. WARNING: Only a qualified
service technician should attempt to reset the control
after latch-up. The problem that caused the repeat lock-
outs must be corrected before returning the burner to
normal operation. NOTE: Recycling power to the control will
not reset it from it from a latch-up condition.
Total History
To Exit Hold
Carlin Combustion Technology, Inc. MN70200B 060217
Status Icons
Status Icons will appear at the top of the 70200 display to indicate the control’s current operating condition.
POWER Indicates that the control is powered (flashes if voltage is too low or too high)
TT Displayed when the TT terminals are physically jumpered, jumpered in the set-up menu, or when thermostat
is calling for heat.
LIMIT Indicates that the burner limit circuit is powered.
IGNITOR Indicates that the ignitor is energized (flashes if ignitor not detected)
MOTOR Indicates that the motor is energized (flashes if motor not detected)
VALVE Indicates that the valve is energized (on entry to pump prime will flash if not detected)
BV Indicates vent input is active (when vent input is selected)
FAULT Flashes in unison with other status icons indicating a problem exists in that area
FLAME Indicates the CAD cell is sensing flame
Amps = 7 mA
Line = 115 VAC
Continue pressing the Hbutton to examine the following
information recorded during the fault cycle.
• Line Voltage
• Motor Amps (OK or Low)
• Ignitor Amps (OK or Low)
• Valve Amps (OK or Low)
• Recycle (Yes or No)
• Burn Time
• Flame Delay
On any fault detail screen listed above, the Ebutton can be
pressed to view the same data in the previous fault cycle. For
example, if in Fault 1 (the most recent fault), the Ignitor Amps
were low, by pressing the Ebutton, the Ignitor Amps in Fault
2 (the previous fault cycle) will be displayed.
To Exit Fault History: Press and hold the F/ ESCAPE but-
ton for 3 seconds at any time.
Total/Run History
In addition to the Fault History (left),the 70200 also logs the
total run history of the control. To enter this menu, simultane-
ously press the Eand F buttons for 3 seconds. The display
below will appear.
To Exit Total History: Press and hold the / ESCAPE but-
ton for 3 seconds at any time.
Press Hbutton to scroll through the history which includes:
• Total On Time • Max Line Volts
• Total Burn Time • Min Line Volts
• Total Burner Run Cycles • Total Recycles
• Faults Cleared (cycles ago)
Service and Troubleshooting continued on next page.
Toggle
Last Fault
No Flame Chk Ign
To Clear Message
Hold 3 Sec
