Troubleshooting; Locating Error Code - McQuay MDS Series Service Manual

6.0 Troubleshooting

6.1 Locating Error Code

Error code will show on both indoor and outdoor units when the system malfunctions. For decorative type indoor
such as wall mounted, ceiling cassette and ceiling convertible, the error code will display via the blinking of the
LED. For units that are connected to the wired controller MC301 (such as ceiling concealed), the error code will
display on controller screen. For outdoor unit, the error code generated will display on the 7 segments display on
outdoor PCB. Each of these locations is indicated as below:
Error code display
for decorative indoor
6
Error code display
for wired handset
Error code display
for outdoor unit
Remark: For error code of phase protector (only applicable to 3 phase model), kindly refer to Appendix 7.16.
60
Remark: Ionizer LED does not contribute to error code blinking.
Blinking
LED
Error
code
Error
code
Service Manual SM-MDS_(ii)