Daikin SkyAir RZR-TA Series Service Manual page 282

Troubleshooting by Error Codes
Troubleshooting
Reference
CHECK 11 Refer to page 301.
Reference
CHECK 12 Refer to page 304.
276
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is it cooling?
NO
Is the
temperature
difference between the suction
YES
pipe and the outdoor heat
exchanger greater than
20°C (68°F)?
NO
CHECK 11
Is the resistance
NO
measured from suction pipe
thermistor disconnected from the
outdoor unit PCB
normal?
YES
Is the low pressure
NO
sensor normal?
YES
Is the low
YES
pressure less or equal to 0.25 MPa
(36.3 psi)?
NO
CHECK 12
Is the voltage between
X18A pins (2) and (3) of outdoor
main PCB (A1P) less or equal to 1.0
VDC? (Low pressure sensor
output voltage)
NO
SiUS281811EA
YES
Short of refrigerant, closed stop
valve, or blocked cooling
system. Check the refrigerant
system.
YES
Replace the outdoor main
PCB (A1P).
Replace the low pressure
sensor (S1NPL).
Short of refrigerant or blocked
cooling system. Check the
refrigerant system.
Replace the suction pipe
thermistor.
Replace the low pressure
sensor (S1NPL).
Replace the outdoor main
PCB (A1P).
Part 6 Service Diagnosis