Fujitsu R407C User Manual

ERROR
CONTENTS
ERROR CAUSE
COUNTERMEASURE
High pressure
error
1. Open ball valve fully.
1. Ball valve is not opened
completely.
1. Error occurrence condition
When any of following
conditions is satisfied:
1) Compressor is stopped
twice or more due to
high pressure protection
within 40 minutes.
2) After 3 minutes have
passed since compressor is
stopped due to high pressur
protection and condition of
compresser restarting is
satisfied, high pressure SW
is operated.
2. Relevant operation
Error is displayed on LED of
outdoor unit and output to
communication bus line.
3. Clearance
When all of following
conditions satisfied:
1) After 3 minutes have
passed since compressor is
stopped due to high pressure
protection and condition of
compressor restarting is
satisfied, high pressure SW
is reset.
2) High pressure protection
is not operated for 40
minutes or longer.
*High pressure SW setting
value 3MPa OFF ,
2.4MPa ON
24
2. Check required installation dimensions.
3. Clean heat exchanger or remove
foreign matter.
4. Check outdoor fan motor operation.
Remove the obstruction in wind path.
If fan motor faulty, replace motor.
5. Check pressure using pressure gauge.
If pressure SW is faulty, replace SW.
2. Outdoor unit short cycle
3. Outdoor heat exchanger is
dirty or clogged with foreign
matter.
4. Outdoor fan motor is faulty.
5. Pressure SW is faulty.
6. Remove obstruction.
7. Clean filter.
8. Check indoor fan motor operation. If
fan motor is faulty, replace motor.
9. Check operation and coil resistance of
following electronic expansion valve. If
it's faulty, replace electronic expansion
valve.
Coil resistance measurement points
Red-white, red-orange, brown-yellow,
brown-blue
(1) Outdoor unit electronic expansion
valve EEV1 and EEV2
Coil resistance: 192 +/-19 ohms.
(2) Indoor units electronic expansion
valve EEV
Coil resistance: 150 +/-15 ohms.
10. Check operation of following solenoid
valves. If operation faulty, replace
solenoid valve.
Cooling operation
(1) Outdoor unit solenoid valve SVS
(2) RB unit solenoid valve SVS
Heating operation
(3) Outdoor units solenoid valves SV2,
SV7, and SV8
(4) RB unit solenoid valve SVD
Heat recovery operation (1), (2),
(3), (4)
11. Clear the cause of overload
(e.g. Caused by indoor unit or outdoor
unit installation)
6. Indoor unit short cycle
7. Filter is clogged.
8. Indoor fan motor is faulty.
9. Electronic expansion valve
operation is faulty.
10. Solenoid valve operation
is faulty.
11. Overload
ERROR
CODE
05-25

Fujitsu R407C Specifications

General

Brand	Fujitsu
Model	R407C
Category	Air Conditioner
Language	English