Service manual

TROUBLESHOOTING
No Fault Name Fault Description Corrective Action
10 OFAN- Vospd
exceeded
Exceeds speed high limit Check motor type matches motor jumpers in
controller
Make necessary arrengments in unit installation
location to avoid back wind
Avoid EMC problems (12.4.10.1)
11 Compressor- IPM Fault Over current / Over temperature of
compress
or IPM
Check no obstruction to controller air opening
Check Compressor ( 12.4.5)
12 Compressor Lock Compressor does not rotate Check Compressor ( 12.4.5)
13 Compressor- Vospd
e
xceeded
Exceeds speed limit Try again and replace controller if still have the
problem
14 Compressor- Foldback High pressure / Current reduces
compress
or speed
Check Compressor ( 12.4.5)
15 DC under voltage DC voltage is lower than limit Replace controller
16 DC over voltage DC voltage exceeds its high limit Check if input voltage higher than limit (270VAC), if
not and the problem pr
esist, replace controller. If
voltage is high, shut off the power and recommend
the customer to fix the power supply
17 AC under voltage AC input voltage is lower than limit Check if input voltage lower than limit (170VAC), if
not and the problem pr
esist, replace controller. If
voltage is low, recommend the customer to fix the
power supply
18 No communication A No signals in line A Check communication (12.4.9)
19 No communication B No signals in line B
20 No communication C No signals in line C
21 No communication D No signals in line D
22 Compressor- Ilegal Exceeds speed low limit See # 13
23
S d
S
ystem Configuration Communication lines changed from last No problem just an announcement
24
Ch d
S
ystem Configuration
Problem
ti
Miss-match bet
ween the IDUs connected
to port A,B,C or D, or the total capacity
code of IDUs is higher than the ODU
maximum capacity code
Change configuration if needed.
25 Heat sink Over Heating
Fault/Protection
Compressor stopped due to heatsink
protection
Check that the airflow around the ODU is free and
the fan is runni
ng free. Check fan motor ( 12.4.4)
26 Deicing Protection During deicing procedure No action required
27 Compressor Over
Heati
ng Protection
Compressor stopped due to over heat
protection
Check if gas is missing in the system
28 System over power
Protection
Compressor stopped due to over power
protection
No action required
29 Bad EEPROM EEPROM not operating Power reset. (Replace Controller just in case you
need EEPROM).
30 Not Configured Cannot start the control Power reset. Replace Controller if didn’t help
31 Bad Communication Bad communication lines See # 18-21
Revision 0 12-3