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GNA-2538 R0
45
Fenwal Troubleshooting
Table 11.
Troubleshooting Guide
Symptom
Recommended Actions
Control does not start
Miswired
No 120 VAC at L1
Fuse or circuit breaker fault
Faulty control, check LED for fault codes
Thermostat on — no spark
Miswired
Faulty thermostat, no voltage at terminal L1
Faulty control, check LED for fault codes
Valve on — no spark during TFI
Shorted electrode — establish a 0.07” (1.78 mm) gap
Check high voltage cable
Miswired
Spark on — valve off
Valve coil open
Check high voltage wire
Poor ground at burner
Poor flame, check flame current
Flame OK during TFI — no flame sense after
TFI
Check electrode position
Check high voltage wire
Poor ground at burner
Poor flame, check flame current
Table 12.
Fault Conditions
LED Indication
Fault Mode
Steady ON
Internal control failure
2 flashes
Flame without call for heat
3 flashes
Ignition lock-out
Note
During a fault condition a software or hardware error, all outputs are turned off and the LED displays a
Steady On condition. If this condition persists after an attempt to restart, then the control must be
replaced.
Internal Control Failure
If the control detects a software or hardware error, all outputs are turned off and the LED displays a steady ON
condition. If this condition persists after an attempt to restart, the control must be replaced.
AXIAL FAN HEATER – LP AND NG-FIRED HEATER
Содержание GGH-8361LO
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Страница 61: ...GNA 2538 R0 61 AXIAL FAN HEATER LP AND NG FIRED HEATER 9 WARRANTY ...