McQuay M5MSY18BR, Manual

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43
Troubleshooting M5MSY
_(i)
Indicator Lights
IR Signal Receiver
When an infrared remote control operating signal has been transmitted, the signal receiver on the indoor unit
will respond as below to con
fi rm acceptance of the signal transmission.
ON to OFF 1 Long Beep
OFF to ON
Pump down/Cool force on
2 Short Beep
Others 1 Short Beep
Heat Pump Unit
The table shows the LED indicator lights for the air conditioner unit under normal operation and fault conditions.
The LED indicator lights are located at the side of the air conditioner unit.The heat pump units are equipped
with an “auto” mode sensor whereby it will provide reasonable room temperature by switching automatically to
either “cool” or “heat” mode according to the temperature set by the user.
IR Receiver
ON/OFF
Cool / Heat
Timer
Sleep
ON/OFF switch
LED Indicator Lights: Normal Operation and Fault Conditions for Heat Pump Unit
(RED)
1
COOL/HEAT
(GREEN/RED)

(ORANGE)
Normal Operation / Fault Indication
Green
Cool mode
Red
Heat mode
Red
Auto mode in Heating operation
Green
Auto mode in Cooling operation
Time off (when unit is on)
Time on (when unit is off)
Sleep mode on
Green
Fan mode on
Green
Dry mode on
Red
Defrost operation
Green
Error indication
ON Blinking
Model
5WMY 10/15 LR
5WMY 10/15/20 JR
5CKY 10/15/20 CR
5CMY 20ER
5CCY 20CR