![background image](http://html.mh-extra.com/html/carrier/42qhe09d8sh/42qhe09d8sh_service-manual_2560841083.webp)
85
18.3.1.2 Indoor / outdoor units communication error(E1(IDU)/ E2(ODU)/ EL 01(IDU/ODU))
Indoor / outdoor units communication error
Start: Power off , then Power on the
A/C by the Breaker. (reconnect the
power wire). Is it still displaying the
error code?
Yes
No
Replacee outdoor unit PCB assembly(include
wiring) totally
Check wiring on the outdoor and indoor
terminal follow the wiring diagram. Is all
connecting correctly?
Yes
No
Measure Vs, is it moving
alternately between positive value
and negative value? (Vs is the
voltage between S and N). Refer
PIC 1
Turn on all indoor unit by remote
controller. Is all indoor unit display
error code?
Turn off the all indoor units. Is IPM
power LED or operating LED lamp
On? Refer PIC2
Yes
A
:
Is all the wiring between
terminal and Indoor PCB
connect ok?
No
Yes
A
No
Reconnect the wiring
Is indoor units number correct? Check
on the outdoor check point . (2 for dual
zone, 3 for tri zone, 4 for qua zone,5 for
qui zone). Refer PIC 4.
Yes
No first time
Yes
Yes
Replace the Indoor PCB
Power on by remote
controller, I
Is it still
displaying the error code
after 3 minutes?
Trouble is solved
No second time
No
Yes
Reconnect the wiring
No
Replace IPM board or
the outdoor main PCB
No
Is the reactor connecting
well
?
No
Reconnect the wiring
Replace the outdoor main PCB
Yes
No
Is main board
lamp on? Refer PIC 3.
Summary of Contents for 42QHE09D8SH
Page 1: ...SUPER INVERTER SERIES MULTI TYPE Service Manual ...
Page 21: ...18 4 5 6 Easy operation 4 5 7 Remote control and optional wired control method ...
Page 25: ...22 5 4 Console 16 Drain pipe 195 Hanging arm 700 600 210 N A ...
Page 29: ...25 6 Service Space unit mm 6 1 Four way cassette compact 6 2 Four way cassette super slim ...
Page 31: ...27 6 5 Under Ceiling 6 6 Hi wall Cool Easy 18C AG ...
Page 32: ...Specifications 7 Electrical Wiring Diagrams 7 1 Indoor unit A6 Duct type 7K 9K ...
Page 33: ...Specifications 12K 18K 24K ...
Page 34: ...Specifications Page 67 Compact Cassette type 7K 9K ...
Page 35: ...Specifications Page 68 12K ...
Page 36: ...Specifications Page 69 18K ...
Page 37: ...Specifications Page 69 24K ...
Page 38: ...Specifications Page 70 Wall mounted type 18C 7K 9K 12K 18K ...
Page 39: ...Specifications Page 71 18C 24K ...
Page 42: ...Specifications Page 81 21K 27K 16022000035910 ...
Page 44: ...Specifications Page 78 36k ...
Page 45: ...Specifications Page 79 42k ...
Page 55: ...Specifications 14K 18K s n o i s n e m i D 3 1 ...
Page 56: ...Specifications 21K 27K ...
Page 57: ...Specifications 28K 36K 42K ...
Page 81: ...83 EC 50 Open or short circuit of outdoor unit temperature sensor T3 T4 T5 ...
Page 112: ......