Owners Manual
Page 37
mrcool.com
Maintenance
Unit Maintenance
Number Error Code Error
22
23
25
26
27
PL Bus low-voltage protection
PH
Bus high-voltage protection
PU
Charge loop error
ee
Driver memory chip error
e3 Low pressure sensor error
C4 ODU jumper cap error
24
Warning
1) Only professionals may carry out annual maintenance.
2) Before contacting any wire, make sure power is turned off.
4) Do not use organic solvent to clean the air conditioner.
5) If you need to replace a component, contact a professional to repair the unit with a
component supplied by MRCOOL® to ensure the quality.
6) Improper operation may damage the unit, causing electric shock or fire.
7) Do not immerse the air conditioner in water or electric shock could occur. Also, do not use
water to rinse the unit during cleaning.
3) Do not allow flammable objects near the unit.
Warning
1) Before cleaning, ensure the power is off. Turn off at circuit breaker and remove the
disconnect, to avoid electric shock.
3)
4)
Use care when cleaning the filter.
If you need to work from an elevated position (such as on a ladder), please exercise caution.
2) Do not wash the air conditioner with water, otherwise fire and/or electric shock may occur.