High Pressure Control In Cooling - Daikin 2MKS40G2V1B Service Manual

SiBE12-816_D
7.7

High Pressure Control in Cooling

F6
Remote
Controller
Display
Method of High-pressure control (operation halt, frequency drop, etc.) is activated in cooling mode if the
Malfunction temperature sensed by the outdoor heat exchanger thermistor exceeds the limit.
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
Check No.01
Refer to P.261
Check No.12
Refer to P.263
Check No.17
Refer to P.269
Check No.18
Refer to P.269
Check No.19
Refer to P.270
Service Diagnosis
The temperature sensed by the outdoor heat exchanger thermistor rises above about
The error is cleared when the temperature drops below about
The installation space is not large enough.
Defective outdoor unit fan
Defective electronic expansion valve
Defective outdoor heat exchanger thermistor
Defective outdoor unit PCB
Defective stop valve
Dirty outdoor heat exchanger
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. 17
Check the installation
condition.
OK
Check No. 19
Check the outdoor fan.
OK
Check No. 18
Check the discharge
pressure.
OK
Check No. 12
Check the electronic
expansion valve.
OK
Check No. 01
Check the outdoor heat
exchanger thermistor.
OK
NG
NG
NG
NG
NG
Troubleshooting for Outdoor Unit
°C.
50
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.
°C.
65
(R14413)
242