Servicing - Daikin DBG Series Service Instructions Manual

SERVICING

Complaint
POSSIBLE CAUSE
DOTS IN ANALYSIS
GUIDE INDICATE
"POSSIBLE CAUSE"
Power Failure
Blown Fuse
Loose Connection
Shorted or Broken Wires
No Low Voltage
Faulty Thermostat
Faulty Transformer
Poor or High Resistance Ground
Improper Heat Anticipator Setting
Improper Thermostat Location
Faulty Limit or Roll Out Switch
Faulty Flame Sensor
Faulty Ignition Control
Gas Valve or Gas Supply Shut Off
Faulty Induced Draft Blower
Dirty Flame Sensor, Low uA
Flame Sensor not in Flame, Low uA
Faulty Gas Valve
Open Auxillary Limit
Improper Air Flow or Distribution
Faulty Blower Motor, Belt, or Pulley
Locking out on Main Limit
Delayed Ignition
Flashback
Orifice Size
Gas Pressure
Cracked Heat Exchanger
Stuck Gas Valve
Furnace Undersized
Faulty Pressure Switch
Blocked or Restricted Flue
Open Roll Out Switch
Bouncing On Pressure Switch
GAS HEATING ANALYSIS CHART
No Heat Unsatisfactory Heat
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Test Method
Remedy
Test Voltage
Test Voltage
Check Wiring
Check Wiring
Check Transformer
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Check Thermostat
Check Transformer
Measure Ground Resistance
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Adjust Heat Anticipator Setting
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Relocate Thermostat
Test Control
Test Flame Sensor
Test Control
Turn Valves to On Position
Test Blower
Clean Flame Sensor
Test/Adjust Position of Flame Sensor
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Replace Gas Valve
Check Blower Speed, Rotation, Belt, Pulleys, Duct
Static, Filter
Check Blower Speed, Rotation, Belt, Pulleys, Duct
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Static, Filter
Check Blower Speed, Rotation, Belt, Pulleys, Duct
Static, Filter
• Check Limit, Gas Press., Temp. Rise, Blower
Rotation, Belt, Pulleys, Duct Static, Filter
Test for Delayed Ignition
Test for Flashback
Check Orifices
Check Gas Pressure
Check Burner Flames
Replace Gas Valve
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Replace with Proper Size Furnace
Test Pressure Switch
Check Flue/Drawdown Pressure
Test Control
Test Negative Pressure, Flue Blockage
DBG***XXX**XXX
S-2, S-3
S-2, S-3
S-313
S-300-302
S-314
S-313
S-304
S-303
S-314
S-314
S-304
S16A,16D,200,
201,205,206,207
S16A,16D,200,
201,205,206,207
S16A,16D,200,
201,205,206,207
S-300,
307, 201
S-308
S-309
S-306
S-307
S-302
S-304
S-310
S-310
S-302
S-310
S-1
S-1
S-4
S-3
S-4
S-3
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