How do I know what coding number is right for my heat pump? (WPM or Touch screen based).

If you are looking for a coding number for your heat pump, the first port of call should always be the product data badge. Example here is an SI75TU heat pump, which has the coding 4017.

If your data badge does not have a code listed, below is a table of heat pump model numbers and the coding number required when using L software or higher on a WPM controller.

You may also find the article "I have Fault code F15 / Sensors fault on my heat pump (WPM or Touch screen based). What does this mean?" useful if you are experiencing coding number issues on the heat pump.

Model Number	Coding Number
LI 8MS	1001
LI 9TE	1001
LI 9TES	1014
LI 9TU	1009
LI 11ME	1001
LI 11MS	1001
LI 11TE	1001
LI 11TES	1015
LI 12TU	1010
LI 15TE	1023
LI 16AS	1001
LI 16TE	1001
LI 16TES	1016
LI 20AS	1001
LI 20TE	1001
LI 20TES	1017
LI 24TE	1001
LI 24TES	1018
LI 28AS	1001
LI 28TE	1001
LI 28TES	1019
LIH 10TE	1020
LIH 22TE	1001
LIH 26TE	1001
LIK 8ME	1001
LIK 8TE	1001
LIK 8TES	1013 / 1041
LIK 12TU	1039 / 1040
LIKI 14TE	1022
LA 6S-TU	5020
LA 6TU	1012
LA 9S-TU	1011 / 5011
LA 9TU	1002
LA 11AS	1001
LA 11MAS	1028
LA 11MS	1001
LA 11PS	1001
LA 11TAS	1027
LA 12PS	1001
LA 12S-TU	5012
LA 12TU	1003
LA 16AS	1001
LA 16MAS	1021
LA 16MS	1001
LA 17PS	1001
LA 17TU	1004
LA 18I-MU	5015
LA 18S-TU	5013
LA 20AS	1001
LA 22HS	1001
LA 22PS	1001
LA 22TBS	1031
LA 24AS	1001
LA 25TU	1005
LA 26HS	1001
LA 26PS	1001
LA 28AS	1001
LA 28TBS	1032
LA 33TBS	1042
LA 35TUR+	5003
LA 40AS	1001
LA 40TU	1006
LA 40TU-2	TBA
LA 60TU	1007
LA 60TU-2	1045
LA 60TUR+	5006
LAJ 11MUR	5004
LAJ 16MUR	5005
LAJ 60TUR+	5007
LAW 6IMR	1037
LAW 9IMR	1024
LAW 14IMR	1038
LAW 14ITR	1025
LSA60TUR	5014
LSA60TPR	5018
LSA60TPR2	5026
LSA100TUR	5019
SI 5ME	4001
SI 5MS	4001
SI 5TE	4001
SI 6TU	4010
SI 7ME	4001
SI 7MS	4001
SI 7TE	4001
SI 8TU	4007
SI 9ME	4001
SI 9MS	4001
SI 9TE	4001
SI 10MER	6005
SI 11KMS	4001
SI 11ME	4001
SI 11TE	4001
SI 11TU	4008
SI 14KS	4001
SI 14ME	4001
SI 14MS	4001
SI 14TE	4001
SI 14TU	4009
SI 16KMS	4001
SI 17TE	4001
SI 18TU	4011
SI 21TE	4001
SI 22TU	4006
SI 24TE	4001
SI 26TU	4020
SI 30CS	4001
SI 30TE	4001
SI 35TU	4019
SI 35TUR	6008
SI 37TE	4001
SI 50TE	4001
SI 50TU	4018
SI 50TUR	6009
SI 70TUR	6007
SI 75TE	4001
SI 75TU	4017
SI 90TU	4025
SI 100TE	4001
SI 130TE	4001
SI 130TU	4026
SI 130TUR+	6002
SIH 6ME	4001
SIH 6TE	4001
SIH 9ME	4001
SIH 9TE	4001
SIH 11ME	4001
SIH 11TE	4001
SIH 20TE	4001
SIH 40TE	4001
SIH 90TU	4015
SIHJ 90TU	4016
SIJ 10MER	6004
SIJ 75TER+	6003
SIJ 130TUR+	6006
SIK 6TES	4030
SIK 7TE-2	4002
SIK 8TES	4031
SIK 9TE-2	4003
SIK 11ME	4001
SIK 11TE	4001
SIK 11TE-2	4004
SIK 11TES	4032
SIK 14TE	4001
SIK 14TE-2	4005
SIK 14TES	4033
SIK 16ME	4001
SIKH 6TE	4001
SIKH 9ME	4001
SIKH 9TE	4001
SIW 6MU	4021
SIW 6TES	4027
SIW 6TU	4012
SIW 8MU	4022
SIW 8TES	4028
SIW 8TU	4013
SIW 11MU	4023
SIW 11TES	4029
SIW 11TU	4014
WI 10TU	3005
WI 14TU	3004
WI 18TU	3006
WI 22TU	3007
WI 35TU	3008
WI 45TU	3009
WI 50TU	3002
WI 65TU	3010
WI 95TU	3011
WI 100TU	3003
WI 120TU	3014
WI 140TUR+	9002
WI 180TU	3015
WIH 120TU	3012
M-Flex 0609	13033
M-Flex 0916	13040
M-Flex M (1ph)	13041
LI16TUR	13032
LA35TBS	13038
LA60STU	13037
LA60STUR	13036

If your model is not listed above, and it is an older model of heat pump, with no electronic expansion valve control and also previously on H or J software, but upgraded to L software (hence looking up a coding number), the defaults were: