Gree GC201808-III, Service Manual

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GREE GMV5 HR HEAT RECOVERY UNITS
208
Troubleshooting: status code, no troubleshooting.
2.2.4.36
“CH” Rated capacity ratio is too high
Error display: ODU mainboard, IDU wired controller and IDU receive light board will
display
Error judgment condition and method:
The system detects rated capacity of online IDUs and ODUs. When the ratio between total rated
capacity of IDUs and total rated capacity of ODUs is more than 1.35, the unit will limit unit on and report
this error.
Possible reason:
■Total rated capacity of IDUs is more than 1.35 times of total rated capacity of ODUs;
■Rearrange project design to reduce IDU capacity or increase ODU capacity.
2.2.4.37
“CL” Rated capacity ratio is too low
Error display:
ODU mainboard, IDU wired controller and IDU receive light board will
display
Error judgment condition and method:
The system detects rated capacity of online IDUs and ODUs. When the ratio between total rated
capacity of IDUs and total rated capacity of ODUs is less than 0.5, the unit will limit unit on and report this
error.
Possible reason:
■Total rated capacity of IDUs is less than 0.5 time of total rated capacity of ODUs;
Troubleshooting:
Rearrange project design to increase IDU capacity or decrease ODU capacity.
2.2.4.38
“CC” No master controlling unit error
Error display: ODU mainboard, IDU wired controller and IDU receive light board will
display
Error judgment condition and method:
Mainboard detects the DIP switch (SA8) of master controlling unit to judge if it is master controlling
unit.
When master controlling unit is not detected in the communication network of multiple modules
system, it will report this error.
Possible reason:
■DIP switch of master controlling unit is abnormal; there is no master controlling unit in the network
■Communication wire of network is abnormal, so that the master controlling unit is not connected to
the network
■Detecting circuit is abnormal