Daikin DZ9VC - Cooling Performance Analysis; Cooling Troubleshooting Guide

20
AVOID CONTACT WITH THE CHARGED AREA
.
•N
EVER TOUCH THE CHARGED AREA BEFORE CONFIRMING
THAT THE RESIDUAL VOLTAGE IS 50 VOLTS OR LESS.
1. S
HUT DOWN THE
POWER AND LEAVE THE
CONTROL BOX FOR 10 MINUTES.
2. M
AKE SURE TO TOUCH THE EARTH GROUND TERMINAL TO RELEASE THE
STATIC ELECTRICITY FROM YOUR BODY (TO PREVENT FAILURE OF THE PC BOARD).
3. M
EASURE THE RESIDUAL VOLTAGE IN
THE SPECIFIED MEASUREMENT POSITION USING A VOM WHILE PAYING
ATTENTION NOT TO TOUCH THE CHARGED AREA.
4. I
MMEDIATELY AFTER MEASURING THE RESIDUAL VOLTAGE, DISCONNECT
THE CONNECTORS OF THE OUTDOOR UNIT’S FAN MOTOR. (IF
THE FAN BLADE ROTATES BY
STRONG WIND
BLOWING AGAINST IT, THE CAPACITOR WILL BE CHARGED, CAUSING THE DANGER
OF ELECTRICAL SHOCK.)
WARNING
POSSIBLE CAUSE
X IN ANALYSIS GUIDE INDICATE
"POSSIBLE CAUSE"
Comp discharge temp > 200F
Comp discharge temp < 105F
Comp discharge SH > 70F
Comp discharge SH < 20F
High pressure > 490psi
High pressure < 255psi
LSV SC > 12F
LSV SC < 4F
OD SSV SH > 20F
OD SSV SH < 4F
Low pressure > 185psi
Low pressure < 100psi
Requested % demand < Actual
Requested % demand > Actual
Repeated stop/start
Weak cooling
No switch cooling
Noise
Stop operation
Liquid stop valve does not fully open
X X X X X X X X X X
Gas stop valve does not fully open
X X X X X X
Line set restriction
X X X X X X X X X X
Line set length is too long X X X X X
Blocked filter-dryer
X X X X X X X X X X
OD EEV coil failure
X X X X
OD EEV failure
X X X
ID EEV coil failure
X X X X X X X X X X X X X X X X X
ID EEV failure
X X X X X X X X X X X X X X X X
Check valve failure – Blocked
X X X X X X X X X
High Pressure switch failure X
Pressure sensor failure
X X X X X X X
Discharge temp sensor failure
X X X X X X X X X
Coil temp sensor failure
X X X X X X X X
Defrost sensor failure
Liquid temp sensor failure
Ambient temp sensor failure X X X X X X X
OD recirculation X X X X X X X
ID recirculation
X X X X X X X X
Dirty OD Heat-exchanger
X X X X X X X
Dirty ID Heat-exchanger X X X X X X X X X
Outdoor Ambient temp is too high X X X X X X X X
Outdoor Ambient temp is too low X X X X X X X X X
ID suction temp is too high
X X
ID suction temp is too low X X X X X X X X X
Mixture of non-condensible gas X X X X X X X X X X
OD fan motor failure X X X X X X X X X
RV failure X X X X X X X X X
RV coil failure
X X X X X X X X X
Over charge
X X X X X X X X X X
Under charge
X X X X X X X X X
Leak
X X X X X X X X X X X
TXV failure X X X X X X X X X X X X X X X X
TXV is small X X X X X X X
TXV is big X X X X X X X X
OD Control Board Failure X
ID Failure X X X X X X X X X X X X X X X X X X
Compressor failure X X X X X X X X X X
Cooling loop is not attached X X X
Cooling loop grease is not enough X X X
Compressor and Gas furnace are operating at the same time X
Low ID CFM X X X X X X X X X
OD: 67-115F
ID: 65 - 85F
COOLING ANALYSIS CHART
Outdoor Normal Temperature Operating Range: 67-115° F / Indoor Normal Temperature Operating Range: 65 - 85° F