Gree GC201808-III, Service Manual

Page: 147 / 362

GREE GMV5 HR HEAT RECOVERY UNITS
143
B. If the system selects the heating mode, the main board is displayed as follows:
Progress
Commissioning Code Progress Code Status Code
Meaning
LED1 LED2 LED3
Code
Display
Status
Code
Display
Status
Code
Display
Status
16_Heating
commissioning
operation
db On 16 On AH On
The system is in
heating-mode
commissioning operation
(the system
automatically selects the
commissioning operation
mode without needing
manual settings).
db On 16 On
Corresponding
fault code
On
A fault occurs on the
heating-mode
commissioning
operation.
db On 16 On J0 On
A fault occurs on other
modules during the
heating-mode
commissioning
operation.
db On 16 On U9 On
A fault occurs on ODU
pipes.
db On 16 On XXXX/U8 On
The system detects pipe
failure of IDU. "XXXX"
indicates the project
number of the faulty IDU.
The fault code "U8" is
displayed after three
seconds. For example, if
a U8 fault occurs on IDU
100, LED3 will circularly
display "01", "00" (two
seconds later), and "U8"
(two seconds later).
Step 18: If no exception occurs when the unit continuously operates for 40 minutes, the system
automatically confirms commissioning completion, stops the entire unit, and restores the standby status.
The main board is displayed as follows:
Progress
Commissioning Code Progress Code Status Code
Meaning LED1 LED2 LED3
Code Display Status Code Display Status Code Display Status
17_Commissioning
completion status
01~04 On OF On OF On
The unit has completed
commissioning and in
standby status. LED1
displays the module
address; LED2 and LED3
display "OF".
Step 19: After unit commissioning is completed, set unit functions according to the actual
engineering requirements on functions. For details about the setting method, refer to the "System
Function Setting Method" part. Skip this step if there are not special requirements.
Step 20: Deliver the unit for use and let users know the precautions.