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Specifications
Page 15
1. Operation Modes and Functions
1.1 Abbreviation
Unit element abbreviations
Abbreviation
Element
T1
Indoor room temperature
T2
Coil temperature of evaporator
T3
Coil temperature of condenser
T4
Outdoor ambient temperature
TS
Set temperature
1.2 Safety Features
Compressor Three-minute Delay at Restart
Compressor functions are delayed for up to one minute upon the first startup of the unit, and are delayed for up
to three minutes upon subsequent unit restarts.
Phase Check Function(for 3 phase models)
If the phase sequence is detected wrong or lack of 1 or 2 phase, the unit won’t start and there is error code displayed on
outdoor PCB.
Low Pressure Check Function(for 48k and 60k models)
The low pressure switch should be always closed. If it is open, the system will stop until the fault is cleared. During
defrosting procedure , 4 minutes after defrosting ends and 5 minutes after compressor is on in heating mode, low
pressure switch won’t be checked.
Note: The system will not check if the protection could be cleared in 30 seconds after the protection occurs. If this
protection occurs 3 times, it won’t recover automatically until the main power is cut off.
Over-current Protection
When compressor is running, if the current is over twice of the rated for 3 seconds, the compressor will stop and an error
code will be displayed on the outdoor PCB. If the current becomes normal, the compressor will restart after 3 minutes.
Note: The current won’t be checked within 3 seconds after the compressor starts. The system will not check if the
protection could be cleared in 30 seconds after the protection occurs.
Sensor redundancy and automatic shutoff
• If any one of temperature sensor malfunctions, the air conditioner displays the corresponding error code and ceases
operation.
Refrigerant leakage detection
This function is active only when cooling mode is selected. It will detect if the compressor is being damaged by
refrigerant leakage or by compressor overload. This is measured using the coil temperature of evaporator T2 when the
compressor is in operation.
1.3 Display Function
Unit display functions
Ceiling&floor
Содержание YEFE BZSM-MOW1 Series
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Страница 15: ...Specifications Page 11 YUFE18BYTM MO X YUFE24BYTM MO X Y G POWER SUPPLY 24V L N C 1 N 1 TO INDOOR UNIT ...
Страница 18: ...Specifications Page 14 YUFE60BYTM MS 1 R S C YUFE60BYSM MS 1 R ...
Страница 24: ...Product Features Page 20 ...
Страница 106: ...Contents i Temperature Sensor Resistance Value Table for T1 T2 T3 and T4 C K 112 i Pressure On Service Port 113 ...