High Pressure Control In Cooling - Daikin FLKS25BAVMB Service Manual

Troubleshooting

3.15 High Pressure Control in Cooling

F6
Remote Control
Display
Method of High-pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if
Malfunction the temperature sensed by the outdoor heat exchanger thermistor exceeds the limit.
Detection
„ The temperature sensed by the outdoor heat exchanger thermistor rises above
Malfunction
„ The error is cleared when the temperature drops below
Decision
Conditions
RK(X)S25/35E2V1B, RK(X)S25/35G2V1B
RK(X)S25/35G2V1B9
„ The installation space is not large enough.
Supposed
„ Dirty outdoor heat exchanger
Causes
„ Defective outdoor fan motor
„ Defective stop valve
„ Defective electronic expansion valve or coil
„ Defective outdoor heat exchanger thermistor
„ Defective outdoor unit PCB
Troubleshooting
Check No.04
Refer to P.103
Check No.06
Refer to P.105
Check No.07
Refer to P.106
Check No.08
Refer to P.106
Check No.09
Refer to P.107
84
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Check the installation space.
Check No. 07
Check the installation
condition.
OK
Check No. 09
Check the outdoor fan.
OK
Check No. 08
Check the discharge
pressure.
OK
Check No. 04
Check the electronic
expansion valve.
OK
Check No. 06
Check the outdoor heat
exchanger thermistor.
OK
(°C)
65
65
NG
NG
NG
NG
NG
SiENBE05-722_A
°C.
°C.
(°C)
54
52
Change the installation
location or direction.
Clean the outdoor heat
exchanger.
Replace the fan motor.
Reconnect the connector or
fan motor lead wires.
Replace the stop valve.
Replace the electronic
expansion valve or the coil.
Replace the outdoor unit
PCB.
Replace the outdoor heat
exchanger thermistor.
Replace the outdoor unit
PCB.
(R11897)
Service Diagnosis