McQuay MWM User Manual

MCQUAY Service Guide Book Diagnosis
60
Single Split Inverter – Y Outdoor Unit
Model Board
M5LCY 10/15 DR S_2_03A
M5LCY 20/25 CR S_2_04A
M5LCY 30/40/50/60 FR -
Error code diagnosis by Outdoor 7-segment Display
In the Y-series model, the 7-segment display section on the outdoor unit indicates the following:
1. Unit running parameters
2. Error codes
Unit Condition Display on 7-segment
Unit in normal
operating
mode
1. Flashes the compressor running frequency for up to 30 minutes after first start-up/
tact switch is pressed.
2. Subsequently, press on the tact switch to return to the above display.
3. Flashes up to 11 running parameters when tact switch is pressed in the sequence
corresponding to the parameter number (refer to Unit Running Parameter Table).
Unit is in fault 1. Flashes unit error code (similar to wireless handset)
2. Flashes up to 11 running parameters when tact switch is pressed in the sequence
corresponding to the parameter number (refer to Unit Running Parameter Table).
1. Unit Running Parameters:
Parameter
Number
Parameter Description Unit/ Range
00 Compressor actual rotation r/s
01 Compressor target rotation r/s
02 Dc bus voltage VDC
03 Total current (x10) A
04 Outdoor air temperature °C
05 Outdoor heat exchanger temperature °C
06 Compressor discharge temperature °C
07 Outdoor heat sink temperature °C
08 Indoor air temperature °C
09 Indoor heat exchanger temperature °C
10 EXV Opening Pulse
2. Error Codes (HAP: Microcomputer in operation; H3P: Error Detection):
LED INDICATION
Description
HAP H3P
Green Red
●
Normal
○ -
Faulty Outdoor Unit PCB Board
● -
Power Supply Abnormality or Faulty Outdoor PCB Board
○
Activation of Protection Device
HAP: Microcomputer in normal operation
H3P: Error Detection
Blinks
●
Off
○
On

McQuay MWM Specifications

General

Brand	McQuay
Model	MWM
Category	Air Conditioner
Language	English