38MBR: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
36
J1 Malfunction
Troubleshooting
Error Code J1
Malfunction decision conditions
When the outdoor pipe temperature is more than 149°F(65°C), the unit stops. It starts up again only when the
outdoor pipe temperature is less than 126°F(52°C).
Supposed Causes
• Faulty condenser temperature sensor
• Dirty heat exchanger
• System leakage or blockage
J1 displayed
High temperature
condenser protecƟon
Is the compressor
temperature higher
than 149°F (65°C)?
Is the connecƟon
between the
temperature sensor
and the PCB in
working order?
Correct the connecƟon.
No
Is the outdoor
ambient temp. higher
than 122°F (50°C)?
Yes
Stop the unit.
Yes
No
Is the resistance of
the condenser temp.
sensor normal
according to
*Appendix 1 ?
Yes
No
Replace the
temp. sensor.
Is the outdoor unit
venƟůaƟon funcƟoning
properly?
No
Ensure the outdoor
unit vent is
funcƟoning properly?
No
Is the outdoor fan
running normally?
Yes
Refer to the Fan Speed
Out of Control
malfuncƟon soluƟon.
Find the cause and
resolve the problem.
No
Is the heat
exchanger dirty?
Yes
Clean the
heat exchanger.
Yes
Replace the
outdoor main board.
Has the problem
been solved?
No
Yes
If the refrigerant level is
not suĸcient, does the
system work aŌer the
refrigerant is added?
No
No
Check whether the
refrigerant system is
funcƟoning normally.
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