Error codes

Type the code from the teach pendant, or words from the message. Each directory is grouped the way the maker prints it: by robot generation, then by section.

50 codes from Universal Robots · page 1 of 2

C4A1 · Lost communication with Controller

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A2 · Lost communication with Safety Control Board A uP

Universal Robots · CB3 and Earlier Models

C4 Communication issue

C4A3 · Communication with Safety Control Board B uP lost

Universal Robots · CB3 and Earlier Models

C4 Communication issue

C4A4 · Communication with primary Teach Pendant uP lost

Universal Robots · CB3 and Earlier Models

C4 Communication issue

C4A5 · Communication with secondary Teach Pendant uP lost

Universal Robots · CB3 and Earlier Models

C4 Communication issue

C4A6 · Communication with primary EUROMAP67 uP lost

Universal Robots · CB3 and Earlier Models

C4 Communication issue

C4A7 · Communication with secondary EUROMAP67 uP lost

Universal Robots · CB3 and Earlier Models

C4 Communication issue

C4A8 · Primary EUROMAP67 uP present, but euromap67 is disabled

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A9 · Secondary EUROMAP67 uP present, but euromap67 is disabled

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A10 · Primary Teach Pendant present, but Teach Pendant safety is disabled

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A11 · Secondary Teach Pendant uP present, Teach Pendant safety is disabled

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A12 · Communication with joint 0 lost

Universal Robots · CB3 and Earlier Models

C4 Communication issue

C4A13 · Communication with joint 1 lost

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A14 · Communication with joint 2 lost

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A15 · Communication with joint 3 lost

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A16 · Communication with joint 4 lost

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A17 · Communication with joint 5 lost

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A18 · Communication with tool lost

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A65 · Lost package from Primary Teach Pendant

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A66 · Lost package from Secondary Teach Pendant

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A67 · Lost package from Primary Euromap67

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A68 · Lost package from Secondary Euromap67

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A69 · Lost package from Secondary Masterboard

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A70 · Lost package from joint 0

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A71 · Lost package from joint 1

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A72 · Lost package from joint 2

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A73 · Lost package from joint 3

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A74 · Lost package from joint 4

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A75 · Lost package from joint 5

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A76 · Lost package from tool

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A77 · Lost package from uPA to joints

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A78 · Lost package from uPA to teach pendant

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A79 · Lost package from uPA to uPB

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A80 · Lost package from uPB

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A81 · Packet counter disagreement in packet from Primary Screen

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A82 · Packet counter disagreement in packet from Secondary Screen

Universal Robots · CB3 and Earlier Models

C4 Communication issueCause given

C4A83 · Packet counter disagreement in packet from Primary Euromap67

Universal Robots · CB3 and Earlier Models

C4 Communication issue

C4A84 · Packet counter disagreement in packet from Secondary Euromap67

Universal Robots · CB3 and Earlier Models

C4 Communication issue

C4A85 · Packet counter disagreement in packet from Safety Control Board B

Universal Robots · CB3 and Earlier Models

C4 Communication issue

C4A86 · Packet counter disagreement in packet from joint 0

Universal Robots · CB3 and Earlier Models

C4 Communication issue

Universal Robots C4A1

Lost communication with Controller

What to do: p. 12 of Universal Robots’s directoryAll Universal Robots codes

MakerUniversal Robots

Applies toCB3 and Earlier Models

SectionC4 Communication issue

Page12

Cause, as the directory gives them

• Communication was lost between the Safety Control Board and the Motherboard

From Universal Robots’s own error code directory. The steps to fix it are the maker’s and are on the page linked above, not copied here.