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User Manual
CONTENTS
Parts and Functions...........................................................................................................................................................1
Safety ................................................................................................................................................................................2
Maintenance ......................................................................................................................................................................4
Fault Checkup ...................................................................................................................................................................5
Installation Procedures ......................................................................................................................................................6
Electrical Wiring ............................................................................................................................................................... 11
Test Run & Failure Code .................................................................................................................................................17
MRV series multi zone air conditioning systems can operate multiple indoor units in heating or cooling. When in cooling,
only units set to cool will run. Same logic applies for heating..
Turn power on for 12 hours prior to start-up to allow the crankcase heater adequate time to protect the compressor.
All indoor units on the same refrigeration system should use the unified power switch to
ensure that all indoor units are all powered on during system operation.
Features:
1. Low static pressure indoor units.
2. Space saving design.
3. System automatically displays any diagnostic error codes.
4. Brushless DC motor for improved energy efficiency.
5. Five fan speeds with a quiet operation mode.
6. Wider range of ESP: 0-0.12in.W.G.(0-30Pa).
7. Centralized controller function (optional from our company).
8. If there is a power outage during while the system is operating, the system will resume
the last mode and settings it was set to run in.
9. This indoor unit only has a wired controller option.
Indoor
Cooling
Dry
Outdoor
Indoor
Heating
Outdoor
Operating Range
Max.
DB: 89.6°F (32°C)
Min.
DB: 64.4°F (18°C)
Max.
DB: 109°F (43°C)
Min.
DB: 23°F (-5°C)
Max.
DB: 80.6°F (27°C)
Min.
DB: 59°F (15°C)
Max.
DB: 69.8°F (21°C)
Min.
DB: 5°F (-15°C)
WB: 73.4°F (23°C)
WB: 57.2°F (14°C)
WB: 78.8°F (26°C)
WB: 59°F (15°C)
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