McQuay MDB075B, Manual

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5
4. INSTALLATION OF LCD REMOTE CONTROLLER
4.1Accessories
The following accessories are included. If any part is missing, contact your dealer immediately.
1
Remote controller
2
Wooden screw 4.1 x 16 (2 pieces)
3
Instruction manual
4.2 Step-by-step guide
i) First, open up the casing of the LCD remote controller into its top and bottom case using a
screwdriver. To do this, insert the screwdriver into the lower slot and slide it in the outward direction.
ii) Fix the bottom case onto the wall with the 2 wooden screws provided. Then, insert the 4 connecting
wires (from the main board) through the slot on the lower right.
iii) Connect one end in each of the 4 wires to the terminal block behind the top case as shown below.
The wire that goes into the "GND" terminal at the top case must be connected at the other end to the
“GND" terminal at the main board. The same goes for the "+5V", "B" and "A" connection.
iv) Fasten back the top and bottom case into place. Hook the two upper claws into their respective slots
and snap the lower part shut.
5. AUTO RANDOM RESTART
When power resumed, the unit will automatically restart and operate at the previous setting as before power
failure occurred. (Remove jumper at JH/JP1 will cancel the auto random restart function. Please refer to
wiring diagram for the location of the JH/JP1).
Error
code
Possible fault
Error
code
Possible fault
E01 Require manual reset (possible causes) E19 Indoor coil sensor 4 short
E02 Compressor 1 high temperature (overload) E20 Indoor coil sensor 1 open
E03 Compressor 2 high temperature(overload) E21 Indoor coil sensor 2 open
E04 Compressor 3 high temperature(overload) E22 Indoor coil sensor 3 open
E05 Compressor 4 high temperature(overload) E23 Indoor coil sensor 4 open
E06 Compressor 1 high pressure trip / contact open E24 Outdoor coil sensor 1 short
E07 Compressor 2 high pressure trip / contact open E25 Outdoor coil sensor 2 short
E08 Compressor 3 high pressure trip / contact open E26 Outdoor coil sensor 3 short
E09 Compressor 4 high pressure trip / contact open E27 Outdoor coil sensor 4 short
E10 Compressor 1 trip / low R-22 / outdoor abnormal E28 Outdoor coil sensor 1 open
E11 Compressor 2 trip / low R-22 / outdoor abnormal E29 Outdoor coil sensor 2 open
E12 Compressor 3 trip / low R-22 / outdoor abnormal E30 Outdoor coil sensor 3 open
E13 Compressor 4 trip / low R-22 / outdoor abnormal E31 Outdoor coil sensor 4 open
E14 Room sensor short E32 Compressor 1 de-ice
E15 Room sensor open E33 Compressor 2 de-ice
E16 Indoor coil sensor 1 short E34 Compressor 3 de-ice
E17 Indoor coil sensor 2 short E35 Compressor 4 de-ice
E18 Indoor coil sensor 3 short