PEERLESS PF-50 Installation, Operation & Maintenance Manual page 64

TROUBLESHOOTING
Table 10.3: Control Board Warning Error Codes
"W"
CODE
#W01
Blinking Screen – Press "Reset" key to view this message
#W02
Blinking Screen – Press "Reset" key to view this message
#W03
Blinking Screen – Press "Reset" key to view this message
#W04
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Error Display
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Error
Corrective Action
Description
1) Check wiring connection to Outdoor Sensor.
2) Remove the wires from terminals #3 and
#4 on the boiler and check the resistance
between them.
• If this reading is below 3000 W check the
Outdoor Sensor
Shorted
reading at the sensor.
• If the reading is the same at the sensor,
replace the sensor.
• If the reading is higher at the sensor, replace
the wiring.
1) Be sure the optional DHW Sensor (54157)
is connected.
2) Remove the wires from terminals #5 and
#6 on the boiler and check the resistance
between them.
DHW Sensor
a. If the resistance is above 10 k W, check the
Open
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.
1) Check wiring connection to DHW Sensor.
2) Remove the wires from terminals #5 and
#6 on the boiler and check the resistance
between them.
a. If this reading is below 1000 W, check the
DHW Sensor
Shorted
reading at the sensor
b. If the reading is the same at the sensor,
replace the sensor.
c. If the reading is higher at the sensor, replace
the wiring.
1) Check wiring connection to flue sensor.
Flue Sensor
2) Compare sensor resistance to Figure 8.7.
Open
If resistance value is incorrect, replace sensor.