10
(3) Display E3, E7, E8
Symptom
Display E3, E7, E8
Cause
Outdoor pipe (coil) temperature sensor and
outdoor temperature sensor and exhaust
temperature sensor fault
S/N
Inspections
How to Solve
Remarks
1
If the temperature sensor on
outdoor power source board is in
good contact with the slot (CN1,
CN2)
Insert again if loose.
Photo 3
2
Measure the resistance on the two ends of
outdoor temperature sensor:
Resistance of CN1 terminal sensor –
(25 / 5K
Ω
). For other resistance, please
℃
refer to the Temperature – Resistance
Sheet. Resistance of CN2 terminal sensor
– (25 / 20K
Ω
). For other resistance,
℃
please refer to the Exhaust Temperature
Sensor Resistance Sheet.
Replace the temperature sensor
if the resistance is incurred to
drift, open or short circuiting.
Photo 4
3
If the above testing is normal
Outdoor power source board
Position and marking of
temperature sensors (CN1, CN2) on
outdoor power source board
CN1 terminal sensor
CN2 terminal sensor
Summary of Contents for WD Series
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Page 34: ...33 3 Power factor correction 4 Intelligent power module ...
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