ASCON Service Guide Book
79
Multi Digital Scroll Outdoor Units
Model Board Handset
AMDS 30/40/50/60/70 A/AR - G18/ MC301
AMDS 80/100/120/150/180/200/240/
260/300/320 B/BR
- G18/ MC301
A5MDS 80/100/120/140/160/180/
200/220/240/260/280/300/320/340/360
/380/400/420/440/460/480/500 B/BR
-
G18/ MC301
Outdoor Error Code
Error code diagnosis by PCB four Digit 7-Segment
MDS Outdoor A Series Error Code
ITEM CODE DESCRIPTION
1 E0 Discharge temperature sensor malfunction
2 E1 Outdoor ambient temperature sensor malfunction
3 E2 Suction temperature sensor malfunction
4 E3 Compressor base temperature sensor malfunction
5 E4 Coil inlet temperature sensor malfunction
6 E5 Coil middle temperature sensor malfunction
7 E6 Coil outlet temperature sensor malfunction
8 E7
Compressor discharge temperature too high > 130⁰C
9 E8 General system failure
10 H1 High pressure trip
11 H2 Digital scroll compressor overload
12 H3 Fixed scroll compressor overload
13 L1 Low pressure trip
14 C- Communication failure between outdoor and all indoors
15 CX “X” indoor no. particular indoor no communication
MDS Outdoor B Series Error Code
ITEM CODE DESCRIPTION ITEM CODE DESCRIPTION
0 EC00 00## indoor unit communication 62 EC62 Refrigerant released
1 EC01 01# indoor unit communication failure 63 EC63 Slaver outdoor unit communication
failure
2~47 …. 02~47# indoor unit communication
failure
64 ER64 TH1 temperature sensor failure
48 ER48 Digital Compressor Overload 65 ER65 TH2 temperature sensor failure
49 ER49 Fix 1 Compressor Overload 66 ER66 TH3 temperature sensor failure
50 ER50 Fix 2 Compressor Overload 67 ER67 TH4 temperature sensor failure
51 ER51 Fix 3 Compressor Overload 68 ER68 TH5 temperature sensor failure
52 ER52 Discharge pressure too high 69 ER69 TH6 temperature sensor failure
53 ER53 Suction pressure is too low 70 ER70 TH7 temperature sensor failure
54 ER54 Outdoor unit’s IC error 71 ER71 TH8 temperature sensor failure
55 ER55 System Error 72 ER72 TH9 temperature sensor failure
56 ER56 Discharge temperature is too high 73 ER73 TH10 temperature sensor failure
57 ER57 - 74 ER74 TH11 temperature sensor failure
58 ER58 4 way valve failure 75 ER75 TH12 temperature sensor failure
59 ER59 Ambient temperature is beyond the limit 76 ER76 Discharge pressure sensor failure
60 ER60 Emergency run 77 ER77 Suction pressure sensor failure
61 ER61 Subheating is beyond the limit 78 ER78 All indoor units Communication Failure
For item 0-47, the last two characters indicate which indoor has communication problem.
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