Owner's Manual

mrcool.com Page 54

Are the high pressure switch

and main control board wired

correctly?

YES

Replace the outdoor main board.

Is the problem resolved?

High pressure protection

Is the outdoor fan running

properly?

Connect the high pressure switch

and main control board.

Check whether the refrigerant

system is functioning properly.

10.10 Error Code: PC 02 (Cont.)

Testing method: Disconnect the

plug. Measure the resistance of

the high pressure protector. If the

protector is normal the value is

0. Does a problem still exist?

Replace high pressure protector.

Stop the unit.

Is the outdoor ambient

temperature higher than

122°F (50°C)?

Check if the outdoor unit

ventilation is good.

Ensure that the outdoor unit

ventilation is functioning properly.

Please refer to the solution of the

“Fan Speed is Operating Outside

of Normal Range” malfunction.

YES

Is the heat exchanger dirty?

Clean the heat exchanger.

Is the high pressure

protector broken?

****Disclaimer****

The error codes and descriptions are for reference only. If your system displays any of

these codes contact a qualiﬁed technician to investigate the matter further.