Daikin SUPER MULTI NX G Series Service Manual

Troubleshooting for Outdoor Unit SiUS12-928_B
173 Service Diagnosis
6.13 High Pressure Control in Cooling
Remote
Controller
Display
F6
Outdoor Unit LED
Display
A j 1 i 2 h 3 i 4 i
Method of
Malfunction
Detection
High pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if the
temperature sensed by the outdoor heat exchanger thermistor exceeds the limit.
Malfunction
Decision
Conditions
 The temperature sensed by the outdoor heat exchanger thermistor rises above about 65°C
(149°F).
 The error is cleared when the temperature drops below about
50°C (122°F).
Supposed
Causes
 The installation space is not large enough.
 Dirty outdoor heat exchanger
 Defective outdoor fan motor
 Defective stop valve
 Defective outdoor electronic expansion valve or coil
 Defective outdoor heat exchanger thermistor
 Defective outdoor unit PCB
Troubleshooting
Check No.01
Refer to P.191
Check No.12
Refer to P.194
Check No.17
Refer to P.198
Check No.18
Refer to P.198
Check No.19
Refer to P.199
(R17394)
Caution
Replace the outdoor fan
motor.
Reconnect the connector or
fan motor lead wires.
Replace the stop valve.
Replace the outdoor heat
exchanger thermistor.
Replace the outdoor unit
PCB.
Replace the outdoor
electronic expansion valve
or the coil.
Replace the outdoor unit
PCB.
Change the installation
location or direction.
Clean the outdoor heat
exchanger.
Check the installation space.
NG
OK
OK
NG
NG
OK
OK
OK
NG
NG
Check No. 19
Check the outdoor fan.
Check No. 18
Check the discharge
pressure.
Check No. 12
Check the outdoor electronic
expansion valve
coil.
Check No. 01
Check the outdoor heat
exchanger thermistor.
Check No. 17
Check the installation
condition.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.

Daikin SUPER MULTI NX G Series Specifications

General

Brand	Daikin
Model	SUPER MULTI NX G Series
Category	Air Conditioner
Language	English