Service manual


GB
4. Leakage or reverse valve fault
The air conditioner shutdo�n immediately �hen meet one of belo� conditions.
1) Heating: coil pipe temp. of outdoor unit can’t decrease 3 degree �ithin setting time
and coil pipe temp. of indoor unit can’t increase 3 degree all along.
2) Cooling: coil pipe temp. of outdoor unit can’t increase 3 degree �ithin setting time
and coil pipe temp. of indoor unit can’t decrease 3 degree all along.
5. High temp. protection of compressor discharge
1) The protection don’t effect if the temp. sensor of compressor discharge fault.
2) The air conditioner stop running immediately and display error code �hen the temp.
of compressor discharge more than Tsd.
3) The compressor decrease frequency until the temp. of compressor discharge less
than 210 OF if the temp. of compressor discharge more than 203 OF. The compressor
resume normal frequency �hen the temp. of compressor discharge less than 194 OF.
6. Temperature s�itch protection of compressor
The air conditioner �ill shutdo�n immediately and display fault code if the temp. s�itch of
compressor s�itch off.
7. High temp. protection of middle coil pipe of condenser
1) The protection don’t effect if the temp. sensor of middle coil pipe fault.
2) The compressor decrease frequency until the temp. of middle coil pipe less than 136
O
F.if the temp. of middle coil pipe more than 134
O
F..
3) It resume normal frequency �hen the temp. of middle coil pipe less than133
O
F..
8. High temp. protection of indoor coil pipe
1) The compressor decrease frequency until the temp. of indoor coil pipe more than
(Tsce-2) if the temp. of indoor coil pipe less than (Tsce-2)in cooling mode.
The compressor decrease frequency until the temp. of indoor coil pipe less than
(Tsce+2) if the temp. of indoor coil pipe more than (Tsce+2) in heating mode.
2) It resume normal frequency �hen the temp. of indoor coil pipe less than Tsce(cooling
mode) or less than Tshe(heating mode).
9. Lo� temp. protection of compressor suction
1) The protection don’t effect if the temp. sensor of compressor suction fault or
compressor don’t run or in heating mode..
2) The compressor decrease frequency until the temp. of compress suction more than
Tss if the temp. of compressor suction less than Tss. It resume normal frequency �hen
the temp. of compressor suction more than (Tss+2).
10. Fault protection of outdoor sensor
The air conditioner is running at the frequency of less than (3/5)*Fmax and display fault
code if the temp. sensor of compressor discharge fault, or the temp. sensor of outdoor
middle coil pipe fault, or the temp. sensor of compressor suction fault, or the temp. sensor
of outdoor ambient fault.
11. High temp. of ambient
1) The protection don’t effect if the temp. sensor of outdoor ambient fault.
2) The air conditioner stop running immediately and display error code if outdoor
ambient temp. more than 131
O
F or less than -4
O
F.