AERCO Esteem O&M Manual - Manual (Page 83)

77
GF-125
b 38
Indirect Water Heater Temperature Sensor Control module detects “open” indirect water heater temperature sen- sor.
Typically an improper or missing connection of the sensor.
•
Review parameter setting for DHW operating signal selection. See Esteem Control Supplement GF-125C for proper selection.
•
Inspect the DHW temperature sensor and wiring, ensure it is secure and in good condition. •
Replace the sensor if problem persists.
b 40
Flue Temperature Sensor Control module detects “open” flue temperature sensor.
Typically an improper or missing connection at the sensor. •
Inspect the flue temperature sensor and wiring, ensure it is secure and in good condition. •
Replace the sensor if problem persists.
b 52
Flue Temperature Sensor Control module detects flue temperature greater than 241ºF, less than 250ºF. Burner off for 150 seconds
•
An indication the heat exchanger flue ways may need cleaning.
See page 68 for procedures
on cleaning.
•
Isolate the boiler from the boiler system piping and drain the boiler heat exchanger.
Flush
the boiler heat exchanger several times, checking the discharge water for signs of scale or sediment.
•
Inspect the flue temperature sensor and wiring, ensure it is secure and in good condition, replace as needed. •
Replace the sensor if problem persists.
b 65
Blower Assembly Control module does not detect proper blower operation during a call for heat.
•
Disconnect the 35Vdc connector at the blower. Restart the boiler sequence and check for 35Vdc at the connector between the black and white wires (pin 1 & 5). •
If 35Vdc is present at the connector, reconnect the wire harness to the blower and ensure a secure connection. Replace the blower assembly if problem is not resolved.
•
If 135Vdc is not present at the connector, inspect the wiring harness. Replace the wire harness if the inspection reveals any signs of damage.
•
Contact AERCO International Technical Support if problem is not resolved
b 116
Incoming Voltage Frequency Inadequate power to con- trol module
Control module requires an incoming voltage of 120V and a frequency of 60 Hz.
•
If the incoming voltage is being supplied by a generator or alternative source, check the frequency supplied and adjust accordingly.
b 118
Flame Current Signal Lost
- Contact AERCO International Technical Support for further assistance.