Malfunction Display: Discharge Temperature Protection; Malfunction Display: Current Protection - Gree R410A Service Manual

3.3 Malfunction display: Discharge temperature protection

Discharge temperature protection
Measure the
discharge temperature: does it have
reached 125℃?
Yes
Are the
electronic expansion valves
broken?
No
When the
discharge temperature is higher than
110℃, whether the compressor reduces
its capacity?
Yes
Check the
capacity demand of indoor units:
is it in the range of outdoor
unit capacty ?
Yes
Check and repair the leakage of the unit. Charge
refrigerant according to the required volume

3.4 Malfunction display: Current protection

wiring of the compressor: is it
No
resistance value of discharge
Yes
Replace relevant electronic
No
No
Refer to the dial-up of indoor
Current protection
Check the
properly connected?
Yes
Is the current
value higher than the preset
value of protector?
Yes
Is the
high pressure normal?
Yes
Is the
voltage normal?
Yes
Replace the mainboard
Measure
temperature sensor: is it
correct(50KΩ)?
No
expansion valve
Replace the oudoor
unit mainboard
and outdoor unit
No
Adjust the compressor
wiring
No
Replace the overcurrent
protector
No
Refer to high voltage
protection
No
Contact the power supply
company
Super Free Match
Service Manual
Yes
Replace the oudoor
unit mainboard
Replace relevant discharge
temperature sensor
137 MAINTENANCE
N