Correct wiring.
Replace outdoor P.C.B MCC-1571.
Does the same error occur in operation
without compressor lead?
Is AC mains voltage correct?
(198 to 264V)
Are connections of
compressor lead and reactor correct?
(Check referring to the Wiring diagram.)
Check outdoor P.C.B MCC-1571.
Defect → Replace.
Correct defective position.
Replace defective part.
Check crushed or broken pipe.
Defect → Correct and Replace.
Correct connector.
Case thermostat error → Replace.
Confirm power supply
construction. etc.
Check outdoor P.C.B MCC-1571.
Defect → Replace.
Open service valve fully.
YES
NO
YES
NO
NO
NO
NO
NO
Is PMV under correct conditions?
Is service valve fully opened?
Are CN609 of P.C. board MCC-1571
connection and case thermostat correct?
Check outdoor P.C.B MCC-1571.
Defect → Replace.
Short each pins of CN609.
Can compressor operate?
Repair defective position.
Recharge refrigerant.
Is there gas leak?
Is there refrigerant shortage?
Check compressor. (Rare short, etc.)
Defect → Replace.
NO
YES
YES
NO
YES
YES
YES
YES
Check
code
[1C]
[16]
[17]
Outdoor
LED display
{*
zzzz
{**{*
zz
zzz
{*
z
Check and troubleshooting
(Item without special mention indicates part of outdoor unit.)
[Case thermo operation, Power supply error ]
[Position detection circuit error]
[Current detection circuit error]
[14]
[Short-circuit of compressor drive element]
{:ON
(
{*:3 sec ON / 0.5 sec OFF)
z:OFF
z**zz
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