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Trouble Shooting Guide-Continued
Symptom
Boiler # x
"Not on Line" Displayed
Outdoor Temp. Sensor readings
are high.
Sensor reading 220°F.
Sensor reading - 35°F.
Low water cut-off alarm.
Power lamp off on Boiler Monitor.
Pump not running.
Off at flow switch.
Off on High Limit.
Corrective Action
Check primary power.
Correct as necessary.
Check communication cable,
check (surge) ground Remove /
Replace (R/R) as necessary.
Initialize system.
Refer to installation manual
mounting instructions. Possible
relocation for sensor.
Check sensor wiring for damage.
R/R as necessary.
Initialize system.
R/R as necessary
Initialize system.
Check power.
Check pump contactor / relay
R/R as necessary.
Replace F1 fusing.
Check main water supply
Replace F1 fusing.
Remove Relay-K1 to isolate circuit
loading.
R/R as necessary.
Reset circuit breaker.
Replace F1 fusing.
Check pump.
Reset circuit breaker
Check paddle on flow switch.
Check pump, contact or relay.
Replace F1 fusing.
Check and correct settings.
Meter amperage on pump.
R/R as needed.
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Possible Cause
Boiler not powered.
Outdoor sensor not mounted
correctly.
Sensor wiring shorted
Sensor wiring open.
Excessive circuit loading of pump
contacts by user supplied system
pump.
Low water level in boiler
Fuse F1 blown.
Excessive circuit loading of pump
contacts by user supplied system
pump.
Circuit breaker tripped.
Excessive circuit loading of pump
contacts by user supplied system
pump.
Pump going off on thermal over-
load circuit breaker tripped
Paddle damaged or missing.
Pump off on thermal overload.
Low limit settings.
Intermittent power or pump
failure.