Mitsumi electronic PKA-A18HA4, PKA-A12HA4 service manual System constraint, Request Code List

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)

[2nd stage cut-in function]··· Request code number "322~324"

			Room temp. Set point		Room temp. < Set point -4 (-7.5°F)
	Start operation		Sub unit start operation		Sub unit stop
Main
unit
		Run
IC-1
Sub
unit		Stop		Run		Stop
IC-2

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.	Setting contents	Initial
(Request code)		setting
No.1	Monitoring the request code of current setting.
(310)
No.2	Rotation and Back-up OFF (Normal group control operation)
(311)
No.3	Back-up function only
(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)

2nd stage cut-in setting

Setting No.	Setting contents	Initial
(Request code)		setting
No.1	Monitoring the request code of current setting.
(320)
No.2	Cut-in function OFF
(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)

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