PACD011001C2 Function
Function Urban Multi “MX1, ME1 Series” Using R-22 35
Operation Contents
Step 1
→
Discharge defrost k = kg/cm²
Compressor 86Hz + OFF
EEV 2000pls
Outdoor Unit Fan OFF + OFF
Outdoor Unit Heat Exchanger Condenser
4 Way Valve OFF
Injection 1 Td Protection Control
Injection 2 OFF
Hot Gas ON
3 Minutes Elapsed
Step 2
→
Suction defrost
Compressor 86Hz + ON
EEV 2000pls
Outdoor Unit Fan OFF + OFF
Outdoor Unit Heat Exchanger Condenser
4 Way Valve OFF
Injection 1 Td Protection Control
Injection 2 Td Protection Control
Hot Gas ON
Conclusion of Defrost Completion
Condition
or
All of R2-1T, R2-2T
≥
12.5ºC
Pc > 20.5k
10 Minutes Elapsed Since
Defrost Operation Start
Step 3
→
HR solenoid valve changeover
Compressor 38Hz + OFF
EEV 2000pls
Outdoor Unit Fan OFF + OFF
Outdoor Unit Heat Exchanger Condenser
4 Way Valve OFF
Injection 1 Td Protection Control
Injection 2 OFF
Hot Gas ON
40 Seconds Elapsed
Step 4
→
Refrigerant is discharged from accumulator
Compressor 76Hz + OFF
EEV Limit of EV Opening
Outdoor Unit Fan H + ON
Outdoor Unit Heat Exchanger Evaporator
4 Way Valve ON
Injection 1 Td Protection Control
Injection 2 OFF
Hot Gas Low Pressure Protection Control
or
5 Minutes Elapsed
Pc > 14k
R5T > Te + 10ºC
Normal Control
∗
Pc = Condensing Pressure
Preparation
for Defrost
Upper Limit Frequency
Limited to 38Hz + ON
1 Minute
Elapses
(VF015)
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