Servicing - Daikin DCG Series Service Instructions Manual

SERVICING

Complaint
POSSIBLE CAUSE
DOTS IN ANALYSIS
GUIDE INDICATE
"POSSIBLE CAUSE"
Power Failure
Blown Fuse
Unbalanced Power, 3PH
Loose Connection
Shorted or Broken Wires
Open Fan Overload
Faulty Thermostat
Faulty Transformer
Shorted or Open Capacitor
Internal Compressor Overload Open
Shorted or Grounded Compressor
Compressor Stuck
Faulty Compressor Contactor
Faulty Fan Relay
Open Control Circuit
Low Voltage
Faulty Evap. Fan Motor
Shorted or Grounded Fan Motor
Improper Cooling Anticipator
Shortage of Refrigerant
Restricted Liquid Line
Dirty Air Filter
Dirty Indoor Coil
Insufficient air across Indoor Coil
Too much air across Indoor Coil
Overcharge of Refrigerant
Dirty Outdoor Coil
Noncondensibles
Recirculation of Condensing Air
Infiltration of Outdoor Air
Improperly Located Thermostat
Air Flow Unbalanced
System Undersized
Broken Internal Parts
Broken Valves
Inefficient Compressor
Expansion Device Restricted
Loose Hold-down Bolts
Flowrator Not Seating Properly
42
COOLING ANALYSIS CHART
Unsatisfactory
No Cooling
Cooling
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Cooling Cycle
System
Operating
Pressures
Test Voltage
Inspect Fuse Size & Type
Test Voltage
Inspect Connection - Tighten
Test Circuits With Ohmmeter
Test Continuity of Overload
Test Continuity of Thermostat & Wiring
Check Control Circuit with Voltmeter
Test Capacitor
Test Continuity of Overload
Test Motor Windings
Use Test Cord
Test Continuity of Coil & Contacts
Test Continuity of Coil And Contacts
Test Control Circuit with Voltmeter
Test Voltage
•
Repair or Replace
•
Test Motor Windings
Check Resistance of Anticipator
•
Test For Leaks, Add Refrigerant
• •
Remove Restriction, Replace Restricted Part
• • •
Inspect Filter-Clean or Replace
• • •
Inspect Coil - Clean
Check Blower Speed and Rotation, Belt, Pulleys,
• • •
Duct Static Filter
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Reduce Blower Speed, Check Pulley Adjustment
• • •
Recover Part of Charge
• •
Inspect Coil - Clean
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Recover Charge, Evacuate, Recharge
• •
Remove Obstruction to Air Flow
• •
Check Windows, Doors, Vent Fans, Etc.
Relocate Thermostat
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Readjust Air Volume Dampers
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Refigure Cooling Load
•
Replace Compressor
• •
Test Compressor Efficiency
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Test Compressor Efficiency
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Remove Restriction, Replace Expansion Device
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Tighten Bolts
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Check Flowrator & Seat or Replace Flowrator
DCC***XXX**XXX
Test Method
Remedy
S-1
S-1
S-1
S-2, S-3
S-2, S-3
S-17A
S-3
S-4
S-15
S-17A
S-17B
S-17D
S-7, S-8
S-7
S-4
S-1
S-16
S-16
S-3B
S-101,103
S-112
S-200,205,
206 207
S-205, 207
S-113
S-114
S-115
S-104
S-104
111
S-111