59
DC Inverter Multi VRF System II
Service Manual
AE
Charge refrigerant
by hand
AF
送风
Fan blow AJ Cleaning alarm for lter
AP
Startup debugging
conrmation of unit
AU
Long-distance emergency
stop
Ab Emergency stop
Ad Limit opereation n0 SE setting for the operation n1 Defrosting period K 1 setting
n2
Upper limit setting
for the collocation
matching ratio for
indoor unit and
outdoor unit
n4
Limit setting for the
maximum ouput capacity
n6
Engineering series number inqury for indoor
unit
n7 Malfunction inquiry n8
Parameters inquiry
nA Heat pump unit
nH Heating only model nC Cooling only model nE Negative code
nF Fan model
3 Troubleshooting
Troubleshooting principle
(1) Communication malfunction
communication
malfunction
check whether indoor
unit and outdoor unit is
power supplied
Energize indoor unit
and outdoor unit
repiace
communication
wire
measure whether the
communication wire
is in normal