McQuay MDS 240B User Manual

86 Service Manual SM-MDS_(ii)
Superheat protecting value too small
Error Code: L0, 40 (For MC301), ER61 (For MDS-M PCB)
Is the coil sensor (ID),
TH12 sensor (OD) and
low pressure sensor
correctly connected?
Connect correctly and operate
again
YES
Recharging with correct amount of refrigerant
NO
Measure suction
pressure. Within spec?
NO
Is the sensors resistance
characteristics normal?
Refer Appendix 7.3 & 7.5
NO
Replace sensor
YES
YES
YES
Is the sensor and pressure
sensor correctly connected?
NO
Replace indoor/outdoor fan motor
NO
Replace EXV
Turn on the unit
YES
Replace PCB
Indoor fan motor
(Cooling) / Outdoor fan
motor (Heating) working?
Is the indoor/outdoor
EXV working properly?
6

McQuay MDS 240B Specifications

General

Brand	McQuay
Model	MDS 240B
Category	Compressor
Language	English