
70
Rev. 2
SERVICING
Complaint
No Heat
Unsatisfactory Heat
POSSIBLE CAUSE
DOTS IN ANALYSIS
GUIDE INDICATE
"POSSIBLE CAUSE"
SYMPTOM
System Will Not Start
Burner Won't Ignite
Burner Ignites-Locks Out
Burner Shuts Off prior to T'Stat being Satisfied
Short Cycles
Long Cycles
Soot and /or Fumes
To Much Heat
Not Enough Heat
Test Method
Remedy
See Service Procedure Reference
Power Failure
•
Test Voltage
S-1
Blown Fuse
•
Test Voltage
S-4
Loose Connection
•
Check Wiring
S-2
Shorted or Broken Wires
•
Check Wiring
S-3
No Low Voltage
•
Check Transformer
S-4
Faulty Thermostat
•
• •
•
Check Thermostat
S-3
Faulty Transformer
•
Check Transformer
S-4
Poor or High Resistance Ground
•
Measure Ground Resistance
S-13
Improper Heat Anticipator Setting
• •
• •
Adjust Heat Anticipator Setting
S-3
Improper Thermostat Location
• •
• •
Relocate Thermostat
Faulty Limit or Roll Out Switch
•
•
Test Control
S-5 & 7
Faulty Flame Sensor
•
Test Flame Sensor
S-14
Faulty Ignition Control
• •
Test Control
S-13
Gas Valve or Gas Supply Shut Off
•
Turn Valves to On Position
S-11
Faulty Induced Draft Blower
•
•
Test Blower
S-9 & 10
Broken or Shorted Ignitor
•
Test Ignitor
S-12
Dirty Flame Sensor, Low uA
•
Clean Flame Sensor
S-14
Flame Sensor not in Flame, Low uA
•
Test/Adjust Position of Flame Sensor
S-14
Faulty Gas Valve
•
•
•
Replace Gas Valve
S-11
Open Auxiliary Limit
•
•
Reset Control
S-6
Improper Air Flow or Distribution
•
•
Check Duct Static
S-21
Cycling on Limit
• •
•
Check Controls & Temperature Rise
S-5 & 22
Delayed Ignition
•
Test for Delayed Ignition
S-19
Flashback
•
Test for Flashback
S-20
Orifice Size
• • •
Check Orifices
S-16
Gas Pressure
•
• • •
Check Gas Pressure
S-18
Cracked Heat Exchanger
•
Check Burner Flames
S-15
Stuck Gas Valve
•
• •
Replace Gas Valve
S-11
Furnace Undersized
•
Replace with Proper Size Furnace
Faulty Pressure Switch
• • •
Test Pressure Switch
S-8
Blocked or Restricted Flue
•
Check Flue/Drawdown Pressure
S-8
Open Roll Out Switch
• •
Test Control
S-7
Bouncing On Pressure Switch
•
Test Negative Pressure
S-8
Содержание GCIA045A30
Страница 34: ...BLOWER PERFORMANCE SPECIFICATIONS 34 Rev 2...