Troubleshooting Chart - Daikin ComfortNet DX18TC Service Instructions Manual

TROUBLESHOOTING CHART

Com plaint
P OSS IBLE CAUSE
DOTS IN ANALYSIS
GUIDE INDICATE
"P OSS IBLE CAUSE"
•
Pow er Failure
•
Blow n Fus e
•
Loose Connection
• • • • • •
Shorted or Broken Wires
Open Fan Ov erload
•
Faulty Thermos tat
•
Faulty Trans f ormer
Shorted or Open Capac itor
Internal Compres sor Ov erload Open
Shorted or Grounded Compress or
Compres s or Stuck
Faulty Compres s or Contac tor
Faulty Fan Relay
Open Control Circuit
Low V oltage
Faulty Ev ap. Fan Motor
Shorted or Grounded Fan Motor
Improper Cooling A ntic ipator
Shortage of Ref rigerant
Res tric ted Liquid Line
Open Element or Limit on Elec . Heater
Dirty A ir Filter
Dirty Indoor Coil
Not enough air across Indoor Coil
Too much air ac ros s Indoor Coil
Ov erc harge of Ref rigerant
Dirty Outdoor Coil
Noncondens ibles
Rec irc ulation of Condens ing A ir
Inf iltration of Outdoor A ir
Improperly Located Thermos tat
A ir Flow Unbalanced
Sy s tem Unders iz ed
Broken Internal Parts
Broken V alv es
Inef f ic ient Compres sor
Wrong Ty pe Ex pans ion V alv e
Ex pans ion Devic e Res tric ted
Ov ers ized Ex pansion V alv e
Unders iz ed Expans ion V alve
Ex pans ion V alv e Bulb Loose
Inoperativ e Expans ion V alve
Loose Hold-dow n Bolts
Faulty Rev ers ing V alv e
Faulty Def ros t Control
Faulty Def ros t Thermos tat
Flow rator Not Seating Properly
•
28
COOLING/HP ANALYSIS CHART
Uns atis factor y
No Cooling
Cooling/He ating
• •
• •
• •
• • •
•
• • • • •
•
• •
• • •
• • •
•
•
• • •
•
•
• •
• •
• •
♦
• • •
• • •
• • •
• •
• • •
• •
• •
• • •
• •
• •
• •
•
•
• • • •
• • • •
•
• • • •
• •
•
•
•
Cooling or He ating Cycle (He at Pum p)
Sys te m
Ope r ating
Pre s s ur e s
Tes t V oltage
Inspect Fus e Siz e & Ty pe
Inspect Connection - Tighten
Tes t Circuits With Ohmmeter
Tes t Continuity of Ov erload
Tes t Continuity of Thermos tat & Wiring
Chec k Control Circ uit w ith V oltmeter
Tes t Capac itor
♦
Tes t Continuity of Ov erload
Tes t Motor Windings
♦
Use Tes t Cord
Tes t Continuity of Coil & Contac ts
Tes t Continuity of Coil A nd Contac ts
Tes t Control Circ uit w ith V oltmeter
Tes t V oltage
•
♦
Repair or Replac e
•
Tes t Motor Windings
Chec k Res istanc e of A ntic ipator
• •
♦
Tes t For Leaks , A dd Ref rigerant
• • •
Remov e Restriction, Replac e Res tric ted Part
♦
Tes t Heater Element and Controls
• ♦
Inspect Filter-Clean or Replace
• ♦
Inspect Coil - Clean
•
♦
Chec k Blow er Speed, Duc t Static Press , Filter
♦ •
Reduce Blow er Speed
• • •
♦
Rec over Part of Charge
♦ •
Inspect Coil - Clean
•
♦
Rec over Charge, Ev acuate, Recharge
•
Remov e Obstruc tion to A ir Flow
Chec k Window s, Doors , V ent Fans, Etc .
Relocate Thermos tat
Readjus t A ir V olume Dampers
Ref igure Cooling Load
•
♦
Replac e Compres sor
• • •
Tes t Compres s or Ef f icienc y
• •
♦
Tes t Compres s or Ef f icienc y
• • ♦
Replac e V alv e
• • •
Remov e Restriction or Replac e Ex pansion Dev ice
•
Replac e V alv e
•
Replac e V alv e
• •
Tighten Bulb Brac ket
•
Chec k V alv e Operation
•
Tighten Bolts
♦ ♦ ♦ ♦ ♦ ♦
Replac e V alv e or Solenoid
♦ ♦ ♦ ♦ ♦ ♦
Tes t Control
♦ ♦ ♦ ♦ ♦ ♦ ♦
Tes t Def ros t Thermostat
• •
Chec k Flow rator & Seat or Replac e Flow rator
♦
He ating Cycle Only (He at Pum p)
Te st Me thod
Re m e dy
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-26,S-27
S-200
S-200
S-113
S-114
S-115
S-104
S-104
S-110
S-110
S-105
S-110
S-21, 122
S-24
S-25
S-111