McQuay MWM - Chilled Water Fan Coil Unit Diagnosis

MCQUAY Service Guide Book Diagnosis
50
Chilled Water Fan Coil Unit
Model Board Handset
MWM 05 – 25FW, 301W W1V3 G7 / SLM3 / Netware 3 / SLM8
MCK 20 – 50AW/MWH W1V3 G7 / SLM3 / Netware 3 / SLM8
MCK 15 – 25BW W1V3 G7 / SLM3 / Netware 3 / SLM8
MCK 10 – 20CW W1V3 G7 / SLM3 / Netware 3 / SLM8
MCM 20 – 50DW/CBW W1V3 G7 / SLM3 / Netware 3 / SLM8
MCC 10 – 60CW W1V3 SLM3 / Netware 3 / SLM8
MDB 75 – 150BW N/A No Controller
Self Diagnostic Table – W1V3
Fault Indication
POWER LED
/ COOL LED
Other LEDs
Error
Code
Action
Room sensor missing Blinks 4 times FAN blinks E1 Check room sensor
connection / change room
sensor
Indoor coil sensor missing Blinks 4 times SLEEP blinks E2 Check indoor coil sensor
connection / change indoor
coil sensor
Pump fault Blinks 2 times COOL & FAN
blink
E6 Clear the clogging at drain
pipe. If pump is not working,
change the pump
Pipe water temperature
poor
Blinks 3 times COOL & DRY
blink
E4
-
Pipe water temperature
fault
Blinks 1 time COOL blinks E5
-
Model Board Handset
MWM 07 – 25G2W W2 G17 / SLM3 / Netware 3 / SLM8
MWM 301W W2 G17 / SLM3 / Netware 3 / SLM8
MCK 20 – 50AW/MWH W2 G17 / SLM3 / Netware 3 / SLM8
MCK 15 – 25BW W2 G17 / SLM3 / Netware 3 / SLM8
MCK 10 – 20CW W2 G17 / SLM3 / Netware 3 / SLM8
MCM 07 – 15CBW W2 G17 / SLM3 / Netware 3 / SLM8
MCM 20 – 50DW W2 G17 / SLM3 / Netware 3 / SLM8
MCM 15 – 25EW W2 G17 / SLM3 / Netware 3 / SLM8
MCC 10 – 60CW W2 SLM3 / Netware 3 / SLM8
MDB 75 – 150BW N/A No Controller
Self Diagnostic Table – W2
Fault Indication COOL LED
Error
Code
Action
Room sensor error (short/open) Blink 1 time E1 Check room sensor
connection / change room air
sensor
Pipe water sensor error (short/open) Blink 2 times E2 Check pipe water sensor
connection / change pipe
water sensor
Water pump error Blink 6 times E6 Clear the clogging at drain
pipe. If pump is not working,
change the pump
Pipe water temperature fault Blink 5 times E5
Window open activated* Blink 3 times - -
Antifreeze mode activated* Blink 7 times - -
Load shedding activated* Blink 8 times - -
*Applicable for 4 pipes applications only.