Mitsubishi Electric PKA-A12HA Service Manual page 28

System constraint
· This function is available only in cooling mode.
Ex.) Set temp. by R/C = 20:(68°F)
Set point = 26:(79°F)
When request code number is "323".
26: 2nd unit Cut-in
(79°F)
4 degree C
(7.5 degreeF)
22: 2nd unit Cut-out
(71.5°F)
20:
(68°F)
10-1-2. How to set rotation function (Back-up function, 2nd stage cut-in function)
You can set these functions by wired remote controller.(Maintenance monitor)
NOTE
Both main and sub unit should be set in same setting.
Every time replacing indoor controller board for servicing, the function should be set again.
(1) Request Code List
Rotation setting
Setting No.
(Request code)
No.1
(310)
No.2
Rotation and Back-up OFF (Normal group control operation)
(311)
No.3
(312)
No.4
Rotation ON (Alternating interval = 1day) and back up function
(313)
No.5
Rotation ON (Alternating interval = 3day) and back up function
(314)
No.6
Rotation ON (Alternating interval = 5day) and back up function
(315)
No.7
Rotation ON (Alternating interval = 7day) and back up function
(316)
No.8
Rotation ON (Alternating interval = 14day) and back up function
(317)
No.9
Rotation ON (Alternating interval = 28day) and back up function
(318)
2
nd stage cut-in setting
Setting No.
(Request code)
No.1
Monitoring the request code of current setting.
(320)
No.2
(321)
No.3
Cut-in Function ON(Set point = Set temp.+ 4°C(7.5°F))
(322)
No.4
Cut-in Function ON(Set point = Set temp.+ 6°C(10.8°F))
(323)
No.5
Cut-in Function ON(Set point = Set temp.+ 8°C(14.4°F))
(324)
[2nd stage cut-in function]··· Request code number "322~324"
Main
unit
IC-1
Sub
unit
IC-2
Setting contents
Monitoring the request code of current setting.
Back-up function only
Setting contents
Cut-in function OFF
Room temp. Set point
Start operation Sub unit start operation
Run
Stop
Initial
setting
Initial
setting
28
Room temp. < Set point -4 (-7.5°F)
Sub unit stop
Run Stop