Warning Errors - PEERLESS PureFire PF-50 Installation, Operation & Maintenance Manual

TROUBLESHOOTING
D. WARNING ERRORS
The P F
® boiler control will display a blinking screen
URE IRE
under several conditions. Several of these conditions provide
the error information directly on the screen. Table 10.3
shows sensor errors and corresponding corrective actions.
1. Outdoor Sensor Error:
a. If the boiler control is set to a CH mode which
requires an outdoor sensor (CH Mode 1 or 2) and the
sensor is not connected, the screen will blink. Pressing
the "Reset" key will display the following error screen.
In this condition, the control will continue to
operate, targeting the Boiler Design Temperature
as a fixed value. To operate at the maximum
efficiency while the sensor circuit is being repaired
or replaced, use CH Mode 7, Internal Reset.
b. If the boiler control is set to a CH mode in which
an outdoor sensor is required and the sensor is
shorted, the screen will blink. Pressing the "Reset"
key will display the following error screen.
c. The boiler will not operate until this problem is
corrected.
d. If the Outdoor Sensor is open, the status screen
will read -40°F and the boiler will run at the boiler
design temperature as set up in the installer menu.
2. DHW Sensor Error:
a. If the boiler control is set to operate on DHW Mode
1 (DHW Sensor), and there is no sensor connected
the boiler will not satisfy a DHW call for heat.
b. The display will blink and the DHW temperature
will read 14°F if there is an open circuit at the
sensor terminals. Pressing the "Reset" key will
display the following error screen.
c. This will also occur if the wires are not properly
connected.
d. If there is a short at the DHW sensor terminals
and the DHW mode is set to Mode 1, the DHW
system will not operate. The display will blink to
indicate a warning error. Pressing the "Reset" key
will display the following error screen.
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3. Flue Sensor Error:
a. If the control senses that the flue temperature does
not rise to above 50°F after ignition, and either the
supply water temperature rises above 120°F or the
return water temperature rises above 80°F , the control
will display "Flue Sensor Hold" and run at 1% Input.
b. If "Flue Sensor Hold" continues for an extended
period of time, the display will blink. Pressing the
"Reset" key will display the following error screen.
4. Cascade – System Sensor Error:
a. In a multiple boiler cascade installation a system
sensor must be connected to the system. If no
system sensor is connected or if there is an open
circuit the display will blink and the display screen
will read as follows:
b. If there is a short circuit in the system sensor
wiring, the display screen will read similarly.
Notice that a short circuit results in a high system
temperature reading (244°F).
c. Under either of these conditions, the Master boiler
will set the supply setpoints of all of the boilers to
match the system setpoint. It will continue to bring
on and shut off boilers based on the thermostat
demand (terminals #1 and #2) and the Boiler
Start/Stop Delay Time.
5. Cascade – Loss of Communication with Master
Boiler:
a. If a dependent boiler is not communicating with the
Master boiler, and it is set as address 2-16, the screen
will blink with the following information displayed.
b. The boiler that is not communicating with the Master
boiler will not run until the problem is corrected.
Other boilers connected to the Master boiler and the
Master boiler itself will operate normally.