Lennox VEP Series, Installation & Operation Instructions

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If master unit displays below, status judgments are enabled.
——
Cycle
code
Progress code Status code
Meaning
progress
LED1 LED2 LED3
Code Display
status code
Display
status Code
Display
status
10_Status
check of
outdoor valves
before startup
db Light 10 Light ON Light Outdoor valves are open .
If unit detects that valve status is not normal, it will display as below:
——
Cycle
code
Progress code Status code
Meaning
progress
LED1 LED2 LED3
Code Display
status code
Display
status Code
Display
status
10_Status
judgments of
outdoor valves
before startup
db Light 10 Light U6 Light Outdoor valves are
closed or not fully
open .
Then check the Gas and Liquid valves whether they are fully open . After the check,
press SW6 return button to restart the judgments.
If unit detects that valve status is normal, it will display as below and start next step .
——
Cycle
code
Progress code Status code
Meaning
progress
LED1 LED2 LED3
Code Display
status code
Display
status Code
Display
status
10_Status
judgments of
outdoor valves
before startup
db Light 10 Light OC Light Outdoor valves are open .
Step 15: step 11 is “Calculate refrigerant quantity manually”
No need to operate. System will start next step .
Step 16: step 12 is “Confirm Test Run ”
In order to make sure all preparation work is done before startup, this step is designed for
user to confirm the startup again. Operate as below:
If master unit displays as below, system is waiting for confirmation signal.
——
Cycle
code
Progress code Status code
Meaning
progress
LED1 LED2 LED3
Code Display
status code
Display
status Code
Display
status
12_Status
judgments of
outdoor valves
before startup
db Light 12 Light AP Blink Ready for units to start Test Run .
Lennox VRF Unit