Gree GC201808-III, Service Manual

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GREE GMV5 HR HEAT RECOVERY UNITS
112
NOTE:
The factory setting is “00”.

After silent mode is set, unit
’s cooling and heating capacity will be lowered correspondingly.
Please be noted.
(4) A8 Aftersales vacuuming mode
This function ensures the vacuum degree of the entire system during maintenance to prevent
operation functions of dead zones. Expansion valves and electromagnetic valves of the unit will be
enabled after this function is set.
(5) n0 Conservation control 1
System conservation is set when conservation operations are required. The default factory setting is
capacity priority control mode. The system capacity may fall off after the conservation mode is set.
Code Function Name
01 Conservation control
– invalid (factory settings)
02 Conservation control - valid
(6) n3 Forcible defrosting operation
This function is set when forcible defrosting is required for the unit during maintenance. After this
function is enabled, the system automatically quits based on quitting conditions and then automatically
runs based on system conditions.
(7) n4 Conservation control 2
The highest capacity output limitation is set when users require forcibly limiting the system power
consumption. The setting scope is as follows:
Code Highest Output Capacity
10 100% (factory settings)
09 90%
08 80%
Note: The cooling or heating effect may fall off after the capacity limitation is set.
(8) n5 Indoor unit project number offset
This function sets the IDU project number when multiple refrigerating systems are controlled in a
centralized manner (by using a remote monitor or centralized controller), avoiding the same project
number between different systems. If the project number is not set, project number conflicts may occur
between systems.
This function only needs to be set on the master system, which is the system with the centralized
control address SA2 DIP sw
itch being “00000”. For details, see the "Centralized Control Address DIP
Switch (SA2_Addr-CC)" section.
(9) n6 Fault query
This function queries historical faults of the system. Up to five historical faults can be memorized in
time order.
(10) n7 Parameter query
This function queries operation parameters of each module of the ODU in real time.