Single Split
38
(2) How to deal with it?
If the outdoor ambient temperature sensor and the outdoor coil temperature sensor have broken down,
the unit will stop running, and alarm E3, E4, E4 simultaneously. The compressor sensor will detect
when the compressor running, 2 minutes later, if >125
℃
,the compressor stop, recover <95
℃
and stop
time over 3 minutes,the compressor can recover running, if it occurs 3 times in 30 minutes, unit stop
and alarm E4,cut off the power can recover. If detect the signal short circuit for 2 minutes, unit stop and
alarm E4. After compressor running 3 minutes, detect open circuit, if the open circuit signal maintain
2 minutes, unit stop and alarm E4.The discharging sensor failure can recover according to the signal.
The outdoor temp. sensor and the outdoor coil pipe temp. sensor used in the fan control and defrosting
control.
4.8 Starting current control
Outdoor unit load control: after the outdoor motor running for 2 seconds, main compressor start up, the
secondary compressor will run 2 seconds later.
4.9 4-way valve control
The rst time for heating, the outdoor fan motor and 4-way valve power on simultaneously, the
compressor stat up delay 2 seconds. After shutdown or schema transformation, the 4-way valve closed
delay 2 minutes 55 seconds.
5. Outdoor PCB test
5.1 There are three pins marked with TEST, please make the two ones near to COOL in short circuit.
Outdoor begin to run in cooling mode, that is, compressor run and outdoor motor works at high speed.
5.2 There are three pins marked with TEST, please make the two ones near to HEAT in short circuit.
Outdoor begin to run in heating mode, that is, compressor and 4-way valve run, outdoor motor works at
low speed.
To Next Page
Loading...
