Startup & Operation
(continued)
Burner ON
After the self-test, amber LED turns off. The ignitor starts, followed 2 seconds later by the motor.
Pump
To enter pump prime: 1. Start a CFH cycle. During Pre-Ignition, press Reset until motor turns
Prime
off (10 seconds), then release the button. When motor turns back on, within 5 seconds, press the Reset button
until the amber LED starts to flash. You are in Pump Prime, release Reset button.
Optional Pump Prime notes: 1) If lost, press Reset for 1 second and release, then if the control is not in
Pump Prime, restart the sequence. 2) If Reset is released before end of first 10 seconds, the control re-
turns to Standby and restarts another CFH cycle. 3) If reset is not pressed the second time, a normal CFH
cycle will continue. 4) If motor and igniter are on and amber LED is flashing, the control is in Pump Prime.
5) Pump Prime will exit standby if flame is detected, or 60 seconds has elapsed, or loss of TT or Limit, or
Reset button is pressed.
TFI
The CAD cell must sense flame within the TFI time limit (trial for ignition). After CAD cell senses flame, the
ignitor stays on another 10 seconds (flame stabilization period).
Run
The burner continues firing during call for heat if the CAD cell is sensing flame. Only the green LED is on
during normal running.
Lockout
If CAD cell does not sense flame within the TFI time limit after the burner starts,
lockout occurs. The con-
trol turns the red LED on constant and closes the alarm contact.
To Reset
Push in and hold reset button for 1 second, then release.
Latch-up
If the control locks out 3 times during a single call for heat, latch-up occurs. The control turns on both the
amber and red LEDs constant. You must use the special procedure below to reset the control after latch-
up.
Reset after latch-up: only a qualified service technician should attempt to reset the control after latch-up.
The problem that caused the repeated burner lockouts must be corrected before returning the burner to
normal operation.
Push in and hold the reset button for 10 seconds. The amber LED will begin to flash.
After the LED begins flashing, continue holding the reset button for 20 seconds. The LEDs will turn off.
Release the reset button and the control will restart (releasing the button before the LEDs turn off will
cause the control to remain in latch-up).
The 50200 control will not reset from lockout or latch-up if power is interrupted.
Flame
If the CAD cell loses flame signal during operation (after the TFI), the red LED flashes. The burner shuts off
Failure
within 2 seconds.
Recycle: Control waits for 65 seconds (with red LED flashing), then begins again at Self-test 2. Red LED
goes off.
If the green LED is blinking during a run, the flame is weak or unstable and may go into recycle.
End cycle
Set thermostat (or aquastat) to stop call for heat. The burner shuts off within 2 seconds after end of call for
heat.
Stand-by
Control remains in stand-by mode until limit circuit sends power to the black wire and thermostat circuit
closes (call for heat).
© Copyright 2015 - Carlin Combustion Technology, Inc.
MN50200 022415
