mcquay digital scroll system l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
MCQUAY DIGITAL SCROLL SYSTEM PowerPoint Presentation
Download Presentation
MCQUAY DIGITAL SCROLL SYSTEM

Loading in 2 Seconds...

play fullscreen
1 / 16

MCQUAY DIGITAL SCROLL SYSTEM - PowerPoint PPT Presentation


  • 377 Views
  • Uploaded on

MCQUAY DIGITAL SCROLL SYSTEM. Troubleshooting. SELF DIAGNOSIS. MDS Outdoor Unit. SELF DIAGNOSIS. MDS Outdoor Unit. Compressor Protection High & low pressure switch / Sensor Overload protection input from compressor. Monitoring Point (Temperature Sensor) Compressor Discharge

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'MCQUAY DIGITAL SCROLL SYSTEM' - collice


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide2

SELF DIAGNOSIS

MDS Outdoor Unit

slide3

SELF DIAGNOSIS

MDS Outdoor Unit

  • Compressor Protection
    • High & low pressure switch / Sensor
    • Overload protection input from compressor
  • Monitoring Point (Temperature Sensor)
    • Compressor Discharge
    • Compressor Suction
    • Ambient Temperature
    • Coil Inlet
    • Coil
    • Coil Outlet
    • Compressor
slide4

SELF DIAGNOSIS

7 segment display on outdoor PCB

slide5

7 Segment Display on outdoor PCB

SELF DIAGNOSIS

Indicator Code

slide6

LED of outdoor PCB

SELF DIAGNOSIS

ERROR Code

slide7

SELF DIAGNOSIS

MDS Indoor Unit

  • Temperature Sensor
    • Coil Inlet
    • Coil
    • Coil Outlet
    • Return air
slide8

LCD Indicator of controller

SELF DIAGNOSIS

ERROR Code

slide9

LED Indicator of Receiver

SELF DIAGNOSIS

ERROR Code

Indication light twinkle related to malfunction code :

slide10

TROUBLESHOOTING

Frequent Malfunction for Commissioning – Communication Error

Symptom:

For A series Outdoor, the 7 segment display C-

For B series Outdoor, the 7 segment display EC78

For Wired Handset, the LCD panel display FC

For LED Display, the Heat LED will be blinking

Potential Caused A:

The communication chip MAX485 of outdoor unit is damaged (Possibility is low. The Communication is tested before ship out)

Solution: To replace the MAX485 chip

Potential Caused B:

The communication wires A/B get crossed each other or not connected

(Most common caused)

Solution: Check on all wiring. Ensure proper tighten and the polarity is consistent.

slide11

TROUBLESHOOTING

Frequent Malfunction for Commissioning – Communication Error (cont’)

Potential Caused C:

Shielding wire is connected to ground terminal (not grounded).

(Long wiring and running the communication wire together with power supply wire will cause this to happen)

Solution: Ensure the shielding wire is only grounded at the outdoor unit. Do not run the communication wire with the power supply wire together.

Potential Caused D:

Address of indoor are wrongly set

(Caution, the indoor address must be start at ‘0000’ and follow. Do no jump the number.)

Solution: Make sure the address start from ‘0000, did not skip any address and no repetition.

slide12

TROUBLESHOOTING

Frequent Malfunction for Commissioning – Specific Indoor Communication Error

Symptom:

For A series Outdoor, the 7 segment display CX (X – Indoor Unit Number)

For B series Outdoor, the 7 segment display ECXX (XX – Indoor Unit Number)

For Wired Handset, the LCD panel display FC

For LED Display, the Heat LED will be blinking

Example:

For A series Outdoor, the 7 segment display C3

(Indoor Unit Number 4 not communicating)

For B series Outdoor, the 7 segment display EC03

(Indoor Unit Number 4 not communicating)

slide13

TROUBLESHOOTING

Frequent Malfunction for Commissioning – Specific Indoor Communication Error (cont’)

Potential Caused A:

Indoor Unit PCB has no power supply.

(Possible the power supply to the indoor had been turned off)

Solution: Check the power supply of the indoor power.

Potential Caused B:

Indoor Unit address error.

(Possible the indoor address is not set or duplication)

Solution: Check the indoor model address.

slide14

TROUBLESHOOTING

Frequent Malfunction for Commissioning – Specific Indoor Communication Error (cont’)

Potential Caused C:

Indoor Unit PCB malfunction.

(Possibility is low. PCB communication is tested before ship out.)

Solution: Replace with another PCB and check the communication

Potential Caused D:

Wrong quantity of indoor set.

(Possible the quantity of indoor unit set in the outdoor PCB is not tally with the actual indoor quantity)

Solution: Check the quantity of indoor unit setting at the outdoor PCB.

slide15

TROUBLESHOOTING

If the followings malfunction occurred, please follow the steps below to resolve :