Sanyo SPW-XR253GH56 Technical Data & Service Manual page 184

15) Symptom: LCD on the remote controller displays "CHECK E16".
When the group of the units are
installed, is there any mis-cross
between inter unit control wiring and
refrigerant tubing?
Are the total capacities of indoor units
to that of outdoor units more than 107%?
Confirm less than 5 indoor units are
connected.
16) "Check P9" is displayed on the remote control unit.
1
Is 15P connector socket (RED)
being attached to panel
connected firmly with 15P plug?
1 2
Replace P.C.B. Ass'y in the
indoor unit.
3
4
5
Start
Yes
No
Yes
No
No
Start
Yes
Yes
Repair the wiring.
Select indoor units which match with
the outdoor capacity.
0647_M_S
Connect firmly.
0649_M_S
IV - 18
4. Service procedures
SM830080