Lennox LIAC024-180P431, Руководство по установке

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27
E4 (Temp. sensor fault)
Diagnosis Handling
Cheak whether sensor T3
/
T4
/
Tf
/
T5 are seated (T4 for Heat
Pump only)
Yes
Unplug the sensor, check
whether the resistance of T3,
T4 is in the range of TABLE1
Yes
Unplug the sensor, check
whether the resistance of TF,
T5 is in the range of TABLE2
Yes
Cheak whether report the
same fault when re-powered
on
Reseat the sensor
according to wiring
nameplate
No
Replace T3 or T4 sensor
No
Replace Tf or T5 sensor
No
Replace the mainboard
Yes
H0 (Communication fault in main control chip)
Diagnosis Handling
Power off and re-power on to
see whether it is normal
Yes
Go back to normal when
electricity grid is normal.Then
it is caused by electricity grid
strong interference.
Replace the mainboard
No
H4/P6
(
IPM module protection)
Diagnosis Handling
Check whether the service
valves are open
Yes
Check whether the compressor
wiring is normal
Yes
Check whether compressor
insulation resistance is below
100kΩ
Yes
Check whether compressor
coil is broken
No
Restart to check that high
and low pressure
difference is within 30PSI
Yes
Check whether discharge
superheat is below 9°F after
starting for 30 min
Open the service
valves
No
Re-start after wiring
correctly according to the
wiring nameplate
No
Replace compressor
Replace compressor
No
Start after pressure balance or if
system can’t balance pressure in
10min, then the refrigerant
system is fault
No
Yes
Replace the mainboard
No
Throttle problem.
Replace TXV of indoor unit in
cooling,or,Replace EXV of
outdoor unit in heating
Yes
Troubleshooting
Function description for the corresponding position (For 48/60k model)
N o . C on t ent N o . C on t ent
1 E X V d r i v ing po rt (HP onl y) 19 P oin t c he ck bu tt on
2 H igh p r e ss u r e s w i t c h po rt 20 T e m p . c on tr olle r c onne c t ion po rt
3 R adia t o r t e m p . s en s o r po rt 21 Fo r c ed ope r a t ion bu tt on
4 C onden s e r t e m p . s en s o r po rt 22 4 - w a y v al v e po rt (HP onl y)
5 O u t doo r t e m p . s en s o r po rt (HP onl y) 23 C onne c t t he c a t hode o f t he r e c t i f ie r b r idge
6 A i r di sc ha r ge t e m p . s en s o r po rt 24 DC m o t o r d r i v ing s ou r c e ( 15 V-P 2)
7 Pr e ss u r e transducer 25 T he v ol t age be t w een 25 and 26 is 380 V d c (C o m p r e ss o r is r unning )
8 C onne c t ion w i r e po rt be t w een m ain boa r ds 26 T he v ol t age be t w een 25 and 26 is 380 V d c (C o m p r e ss o r is r unning)
9 DC m o t o r d r i v ing s ou r c e ( 15 V-P 2) 27 C onne c t ion w i r e po rt be t w een m ain boa r ds
10 T he v ol t age be t w een 10 and 11 is 380 V d c (C o m p r e ss o r is r unning ) 28 AC po w e r s uppl y inpu t po rt
11 T he v ol t age be t w een 10 and 11 is 380 V d c (C o m p r e ss o r is r unning ) 29 AC po w e r s uppl y inpu t po rt
12 T he v ol t age be t w een 12 and 13 is 380 V d c (C o m p r e ss o r is r unning ) 30 AC po w e r s uppl y ou t pu t po rt
13 T he v ol t age be t w een 12 and 13 is 380 V d c (C o m p r e ss o r is r unning ) 31 AC po w e r s uppl y ou t pu t po rt
14 DC m o t o r c on tr ol po rt 32 C o m p r e ss o r c onne c t ion t e r m inal
15 N i x ie t ube di s play 33 T he v ol t age be t w een 33 and 36 is 380 V d c (C o m p r e ss o r is r unning )
16 R e s e r v ed 34 R ea c t o r L1 w i r ing t e r m inal
17 D e fr o s t ing f un c t ion dial c ode S W5 35 R ea c t o r L2 w i r ing t e r m inal
18 Fun c t ion dial c ode S W4 36 T he v ol t age be t w een 33 and 36 is 380 V d c (C o m p r e ss o r is r unning)