McQuay MDS030A, Руководство по обслуживанию

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66 Service Manual SM-MDS_(ii)
L2
Low pressure sensor
broken

Low pressure sensor connecting wire broken

Outdoor PCB LS port broken
74
L3
Indoor and outdoor
communication

Outdoor work normal, but all indoor communication abnormal
76
10
System malfunction
(slave unit)

Slave unit high pressure malfunction occurred 3 times

Low pressure malfunction occurred 3 times

Discharge temperature too high 1 times

Compressor overload protector jumped for 3 times
80
11
TH1 open/short-circuit
(slave unit discharge)

Slave unit discharge temperature sensor TH1 broken or loose
73
12
TH2 open/short-circuit
(slave unit 1# inlet coil)

Slave unit 1# inlet coil temperature sensor TH2 broken or loose
13
TH3 open/short-circuit
(slave unit 1# midlet
coil)

Slave unit 1# midlet coil temperature sensor TH3 broken or loose
14
TH4 open/short-circuit
(slave unit 2# inlet coil)

Slave unit 2# inlet coil temperature sensor TH4 broken or loose
15
TH5 open/short-circuit
(slave unit 2# midlet
coil)

Slave unit 2# midlet coil temperature sensor TH5 broken or loose
18
TH8 open/short-circuit
(slave unit ambient
temperature)

Slave unit ambient temperature sensor TH8 broken or loose
19
TH9 open/short-circuit
(slave unit total outlet
coil)

Slave unit outlet coil temperature sensor TH9 broken or loose
1A
TH10 open/short-circuit
(slave unit sub-cooling
outlet)

Slave unit sub-cooling outlet coil temperature sensor TH10 broken or loose
1B
TH11 open/short-circuit
(slave unit super
cooling suction
temperature)

Slave unit sub-cooling suction temperature sensor TH11 broken or loose
1C
TH12 open/short-circuit
(slave unit suction
temperature)

Slave unit suction temperature sensor TH12 broken or loose
1F
Emergency run

Premise: part indoor communication failure

Slave unit suction super-heat less than 1ºC for 15 minutes persistently.

Slave unit TH12 malfunction
87
20
Outdoor storage
malfunction (slave unit)

Slave unit PCB chip data read failure by outdoor unit when power on

Slave unit PCB chip broken
82
6