Household Unit Technical Service Manual
19
3.2 Fault Analysis
3.2.1 Fault Analysis Flow
断路器跳闸（或
保险丝熔断）
室内机组和室外
机组均不能起动
空调机不能起动
传感器开路或适中
功能在起作用
开关总成故障
锁定压缩机电机截
止功能在起作用
压缩机绕组保护功
能在起作用
在室内外机组之间发
生了串行通信故障
检查供电状况
检查断路器，对
短路测量电阻
对接地，测绝缘电阻
当将断路设定在"开"
时，马上跳开
将空调机转为"开"时，
断路器几分钟就跳闸
没有供电
手操器故障
检查手操器
The air conditioner cannot
be started
The circuit breaker is
tripped (or the fuse is
burnt).
Tripping occurs immediately
after the circuit breaker is set to
“ON”.
Measure the insulation
resistance to the ground.
The circuit breaker is
disconnected several minutes
after the air conditioner
is
switched to “ON”.
Check the circuit breaker and
measure the short-circuit
resistance.
Neither the indoor nor
indoor unit can be started.
No power supply.
Check the condition of power
supply.
Failure to the remote
controller
Check the remote
controllerr
Serial communication fault
between the indoor and outdoor
unit.
The protection of compressor
windings is activated.
The motor cutoff to lock the
compressor is activated.
The sensor is in open circuit or
the protection is activated.
Switch assembly failure
