Maintenance And Care; Outdoor Heat Exchanger - Lennox VEP034N432US User Manual

Debugging:
Error Code
U0 Preheat time of compressor is insufficient
Wrong setting of ODU's capacity
U2
code/jumper cap
U4 Refrigerant-lacking protection
Wrong address for driving board of
U5
compressor
U6 Alarm because valve is abnormal
U8 Malfunction of pipeline for IDU
U9 Malfunction of pipeline for ODU
UC Setting of main IDU is successful
UL Wrong button-dial
UE Charging of refrigerant is invalid
Communication malfunction between IDU,
C0
ODU and IDU's wired controller
Communication malfunction between main
C2
control and inverter compressor driver
Communication malfunction between main
C3
control and inverter fan driver
Status:
Error Code
A0 Unit waiting for debugging
A1 Inquiry of compressor operation parameters
Refrigerant recovery operation of
A2
after-sales
A3 Defrosting
A4 Oil-return
A6 Heat pump function setting
A7 Quiet mode setting
A8 Vacuum pump mode
A9 IPLV test
AA EU AA level EER test mode
AH Heating
AC Cooling
AL Charge refrigerant automatically
AE Charge refrigerant manually
AF Fan
AJ Cleaning reminding of filter

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
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DC Inverter Multi VRF System
Error Code
C4 Malfunction of lack of IDU
Alarm because project code of IDU is
C5
inconsistent
C8 Emergency status of compressor
C9 Emergency status of fan
CH Rated capacity is too high
CC Malfunction of lack of main control unit
CL Rated capacity is too low
CF Malfunction of multiple main control units
Address DIP switch code of system is
CJ
shocking
CP Malfunction of multiple wired controller
Communication malfunction between
CU
IDU and the receiving lamp plate
Cb Overflow distribution of IP address
Error Code
Debugging confirmation when starting up
AP
the unit
AU Long-distance emergency stop
Ab Emergency stop of operation
Ad Limit operation
n0 SE operation setting of system
n1 Setting of defrosting cycle K1
Setting of upper limit of IDU/ODU
n2
capacity distribution ratio
Limit setting for max. capacity/output
n4
capacity
n6 Inquiry of malfunction
n7 Inquiry of parameters
n8 Inquiry of project code of IDU
nA Heat pump unit
nH Heating only unit
nC Cooling only unit
nE Negative code
nF Fan model
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