Lennox VEP034N432US, User Manual

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DC Inverter Multi VRF System
36
Debugging:
Error Code Content Error Code Content
U0 Preheat time of compressor is insufficient C4 Malfunction of lack of IDU
U2
Wrong setting of ODU’s capacity
code/jumper cap
C5
Alarm because project code of IDU is
inconsistent
U4 Refrigerant-lacking protection C8 Emergency status of compressor
U5
Wrong address for driving board of
compressor
C9 Emergency status of fan
U6 Alarm because valve is abnormal CH Rated capacity is too high
U8 Malfunction of pipeline for IDU CC Malfunction of lack of main control unit
U9 Malfunction of pipeline for ODU CL Rated capacity is too low
UC Setting of main IDU is successful CF Malfunction of multiple main control units
UL Wrong button-dial CJ
Address DIP switch code of system is
shocking
UE Charging of refrigerant is invalid CP Malfunction of multiple wired controller
C0
Communication malfunction between IDU,
ODU and IDU’s wired controller
CU
Communication malfunction between
IDU and the receiving lamp plate
C2
Communication malfunction between main
control and inverter compressor driver
Cb Overflow distribution of IP address
C3
Communication malfunction between main
control and inverter fan driver
Status:
Error Code Content Error Code Content
A0 Unit waiting for debugging AP
Debugging confirmation when starting up
the unit
A1 Inquiry of compressor operation parameters AU Long-distance emergency stop
A2
Refrigerant recovery operation of
after-sales
Ab Emergency stop of operation
A3 Defrosting Ad Limit operation
A4 Oil-return n0 SE operation setting of system
A6 Heat pump function setting n1 Setting of defrosting cycle K1
A7 Quiet mode setting n2
Setting of upper limit of IDU/ODU
capacity distribution ratio
A8 Vacuum pump mode n4
Limit setting for max. capacity/output
capacity
A9 IPLV test n6 Inquiry of malfunction
AA EU AA level EER test mode n7 Inquiry of parameters
AH Heating n8 Inquiry of project code of IDU
AC Cooling nA Heat pump unit
AL Charge refrigerant automatically nH Heating only unit
AE Charge refrigerant manually nC Cooling only unit
AF Fan nE Negative code
AJ Cleaning reminding of filter nF Fan model
8 Maintenance and Care
Regular check, maintenance and care can extend unit’s service life. Please have specialized
person in charge of the management of air conditioners.
8.1 Outdoor Heat Exchanger
Outdoor heat exchanger shall be cleaned regularly, which is at least once every two months. You
can use a dust catcher with nylon brush to clean away the dust on the heat exchanger. If compressed