PEERLESS PUREFIRE PFW-199, Installation, Operation & Maintenance Manual, Page: 52 / 81

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Table 10.3: Control Board Warning Error Codes
“W”
CODE
Error Display
Error
Description
Corrective Action
#W02
Blinking Screen – Press “Reset” key to view this message
DHW Sensor
Open
1) Be sure the optional DHW Sensor (3354157)
is connected.
2) Remove the wires from terminals #5 and
#6 on the boiler and check the resistance
between them.
a. If the resistance is above 10 k
Ω
, check the
resistance at the sensor.
b. If the reading at the sensor is the same,
replace the sensor.
c. If the reading at the sensor is lower, replace
the wiring.
C. WARNING ERRORS
The PureFire boiler control will display a blinking
screen 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.
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 (-10°C) 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.
TROUBLESHOOTING