mrcool 13seer r410 cond install manual 4web

Unitary Ducted Split AC & HP
33
9.5 Setting on Defrost Control PCB (for Heat Pump unit only)
There are 5 different defrost control setting you can choose by change the dip switch located
on Defrost Control PCB.
ON
12
000 001 010 011 100
3
DIP ON
12 3
DIP ON
12 3
DIP ON
12 3
DIP ON
12 3
DIP
Fig.30
Table 13
Without Outdoor Ambient
Sensor installed
Dip Switch Setting 000 001 010 011 100
t(min) 44 44 60 90 30
T1
28 ℉ 23 ℉ 32 ℉ 32 ℉ 32 ℉
T2
59 ℉ 59 ℉ 68 ℉ 68 ℉ 68 ℉
t-----------Accumulation of compressor running time
T1----------Initiation Coil Temperature
T2---------Termination Coil Temperature
The factory default setting is “000”. After the compressor consecutively runs for 44 minutes,
the defrost cycle will be initiated if the sensor detects the coil temperature ≤ 28 F for consecutive
1 minute. The defrost cycle will be terminated either the coil temperature reach 59 F or the defrost
cycle reach 15 minutes.
Defrost Cycle: when the system running in heat pump mode, after the compressor has been
running for “t” minutes continuously, the defrost cycle start if the defrosting temp sensor has been
in T1 degree or under T1 degree for 1 minute continuously. During the defrost cycle, the reversing
valve is energized, the outdoor fan stops running and the auxiliary electric heating is energized.
The defrost cycle will be terminated if defrost cycle reach 15 minutes or the coil sensor detects the
coil temperature over T2 degree.
9.6 Manually Defrost Cycle
There is a Manually Defrost Button located on the Defrost Control PCB, by press this button,
the system will go to defrost cycle right away to melt the ice on the coil.
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