67
Status:
Error Code
Content
Error Code
Content
A0
Unit waiting for debugging
Ay
Shielding status
A2
Refrigerant recovery operation of
after-sales
n0
SE operation setting of system
A3
Defrosting
n3
Compulsory defrosting
A4
Oil-return
n4
Limit setting for max. capacity/output
capacity
A6
Heat pump function setting
n5
Compulsory excursion of
engineering code of IDU
A7
Quiet mode setting
n6
Inquiry of malfunction
A8
Vacuum pump mode
n7
Inquiry of parameters
AH
Heating
n8
Inquiry of project code of IDU
AC
Cooling
n9
Check quantity of IDU on line
AL
Charge refrigerant automatically
nA
Heat pump unit
AE
Charge refrigerant manually
nH
Heating only unit
AF
Fan
nC
Cooling only unit
AJ
Cleaning reminding of filter
nE
Negative code
AP
Debugging confirmation when
starting up the unit
nF
Fan model
AU
Long-distance emergency stop
nJ
High temperature prevention when
heating
Ab
Emergency stop of operation
nU
Eliminate the long-distance shielding
command of IDU
Ad
Limit operation
nb
Bar code inquiry
An
Child lock status
nn
Length modification of connection
pipe of ODU
8 Maintenance and Care
Regular check, Maintenance and care should be performed every six months by
professional personnel, which will prolong the unit life span.Disconnect the power supply
before cleaning and maintenance.
8.1 Outdoor Heat Exchanger
Outdoor heat exchanger is required to be cleaned once every six months. Use vacuum
cleaner with nylon brush to clean up dust and sundries on the surface of heat exchanger. Blow
away dust by compressed air if it is available. Never use water to wash the heat exchanger.
8.2 Drain Pipe
Regularly check if the drain pipe is clogged in order to drain condensate smoothly.
8.3 Notice before Seasonal Use
Check if the inlet/outlet of the indoor/outdoor unit is clogged.
Check if the ground wire is earthed reliably.
Check if battery of remote wireless controller has been replaced.
Check if the filter screen has been set soundly.
After long period of shutdown, open the main power switch 8 hours before reoperating the
unit so as to preheat the compressor crankcase.
Check if the outdoor unit is installed firmly. If there is something abnormal, please contact
the Lennox appointed service center.
Lennox
VRF Unit
