Service Manual

8. Troubleshooting
224
SMGB0079 rev.0 - 01/2013
Alarm code
31
Incorrect Capacity Setting or Combined Capacity between Indoor Units and Outdoor Unit
• The RUN LED ickers and “ALARM” is displayed on the remote control switch.
• The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit
number and the alarm code are displayed on the display of the outdoor unit PCB.
- This alarm code is indicated when the undened setting is set to DSW3 on the outdoor unit PCB.
- This alarm code is indicated when the total indoor unit capacity is not equal to the combined outdoor unit capacity.
Outdoor unit capacity setting is not correct
Conditions:
Outdoor capacity
Total indoor unit
capacity of outdoor
unit capacity
RAS-(2-2.5)HVNP / RAS-(3-12)H(V)NC(E) 80 ~ 120%
RAS-(3-12)H(V)NP(E) 45 ~ 150%
Phenomenon Cause Check item
Action
(Turn OFF Main Switch)
Incorrect Capacity Setting of Indoor Unit
Check combination of indoor units
and capacity setting on PCB.
Correctly set dip switch, DSW3.
Incorrect Capacity Setting of Outdoor Unit
Check capacity setting on outdoor
unit PCB.
Correctly set dip switch, DSW3.
Total Indoor Unit Capacity Connected to the Outdoor Unit is Beyond
Permissible Range
Check outdoor unit model by
calculating total indoor units
capacity.
Ensure that total indoor unit
capacity agrees with the above
capacity conditions.
N O T E
• IncaseofH-LINKsystem,thisalarmcodeisindicatedwhenDSW4,RSW1(forrefrigerantsystemsetting)on
theoutdoorunitPCBandDSW5,RSW2(forrefrigerantsystemsetting)ontheindoorunitPCBareincorrectly
set.
• Inthiscase,setcorrectlyDSW4,RSW1,DSW5andRSW2afterturningOFFmainswitch.
• (RSW2isnotequippedwithsomemodels.)