Carrier RAV-SP180UT-UL Service Manual page 98

[E04 error]
Does outdoor unit work?
YES
Check indoor unit board.
→ Replace defective board.
[E10 error]
Is there no disorder of power supply?
NO
Check indoor control P.C. board
(MCC-1510).
Defect → Replace
NO
Is group address set correctly?
YES
Are L1/L2/S wires normal?
YES
Are connectors from indoor unit
and outdoor unit connected normally?
YES
Is indoor unit switch SW02 setting correct?
Bit 1: OFF
Bit 2: OFF
YES
Does voltage between indoor unit terminal
L2 and S fluctuate? (0-140V DC)
YES
• Measure within
Is 280V DC applied across IPDU
main circuit capacitor?
YES
Is 280V DC supplied to CDB? (CN03)
YES
Is 7V DC supplied to CDB?
Is CN06 – CN800 connection normal?
YES
Is case thermostat sensor connected?
(CN500)
YES
Is case thermostat sensor working?
YES
Check and correct
refrigerant volume.
YES
NO
NO
NO
NO
NO
20 seconds
from power on.
NO
NO
NO
NO
NO
– 98 –
Check CODE No. "14".
Correct wires.
Correct connector connection.
Correct switch setting
on MCC-1510 P.C. board.
Check MCC-1510 P.C. board.
→ Replace it if necessary.
Black 3
White 2
1
Terminal block
Replace IPDU.
Replace IPDU.
Replace IPDU.
Correct connector connection.
Correct connector connection.
Check MCC-1510 P.C. board.
→ Replace it if necessary.
Check CDB.
→ Replace it if necessary.
Check power supply voltage.
Correct lines.
Check and eliminate noise, etc.
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