Sanyo SPW-D253GH56 Service Manual page 76

12) Symptoms: LCD on the remote controller displays "CHECK P03".
Unusual discharge gas temperature
• Refrigerant shortage
• Clogged refrigerant circuit
• Electronic refrigerant control
valve defect (indoor unit)
13) Symptom: LCD on the remote controller displays "CHECK P04". (High-pressure
Start
The system does not operate again.
Yes
High-pressure switch activation
(Both cooling and heating)
• Electronic refrigerant control valve
defect
• Refrigerant over-charged
(Cooling)
• Outdoor unit, heat exchanger dirty,
clogged
• Outdoor unit air short
4
• Outdoor fan stopped
(Heating)
• Outdoor unit air short
• Indoor unit, heat exchanger dirty,
clogged
• Large pipe side service valve
closed
• Indoor fan stop
• Air filter clogged
(Alarm for unusual discharge temp. of compressor)
Start
0343_M_I
switch activation warning)
No
Are there connection defects in
the wiring?
High-pressure switch defect
Yes
No
– 76 –
4. Service procedures
Repair the wiring.
0344_M_I
SM830036