McQuay MDS 100B

Service Manual SM-MDS_(ii) 73
6.6 Troubleshooting Flow Chart
Indoor/outdoor sensor failure
Error code: Decorative Error code #2 and #4, E1 to EC, F1 to F5, 11 to 1C (For MC301), E0 to E6 (For MDOM
PCB), ER64 to ER75 (For MDS-M PCB)
Remark:
OD
ID
Spec
PCB
:
:
:
:
Outdoor
Indoor
Specification
Control Module/Control Board
Is the sensor correctly
connected?
Connect correctly and operate
again
YES
NO
Is the sensor resistance
characteristics normal?
Refer Appendix 7.5
NO
Replace sensor
YES
Replace PCB
Turn off the unit
6