Panasonic U-4LE1E5, Руководство по обслуживанию

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Mini VRF SYSTEM
Control Functions
14. Servicing and Maintenance Functions
(1)
(2)
The below functions are available, and are selected by the outdoor unit EEPROM settings.
14-1. Outdoor Unit Noise Countermeasures (outdoor Quiet mode function)
This function reduces the operating noise to lessen the noise produced by the outdoor unit. When this mode is
selected, noise reduction is given priority during operation, and the outdoor fan mode and compressor operating
frequency are restricted (to approximately 80% of capacity).
The following two operations are required in order to engage this mode. (This mode cannot be engaged when nei-
ther (1) nor (2) below has been completed.)
Outdoor unit EEPROM settings
Outdoor unit EEPROM 05 can be set from 0 to 1.
Short-circuit the “SILENT”2P pin on the outdoor unit PCB.
14-2. Slime Countermeasure:EEPROM 0C (set only on the main unit)
14-3. Delayed Start for Each System:Outdoor EEPROM 3E
The operation start time can be delayed according to the set system addresses.
This setting reduces voltage drops by preventing multiple systems from starting at the same time when operation is
restarted after recovery when multiple operating systems were stopped due to a power outage or other cause.
Noise reduction mode is engaged constantly when this pin is short-circuited. To operate in noise reduction
mode only at night, or for similar control at other times, use an external timer (field supply).
This setting controls the operation of the drain pump.
EEPROM
setting
Max. fan
mode
Capacity ratio Effect
Normal operation (setting at time of factory shipment) 100% 14
12 5 and 6 hp units. Noise reduced by approx. 3 dB from the catalog value.
Only 4 hp unit. Noise reduced by approx. 3 dB from the catalog value.
1
11
0
Approx. 80%
EEPROM
setting
Details of operation
Normal operation (setting at time of factory shipment)
1
0
2
Drain pump operates for 20 minutes at 2-hour intervals
Drain pump operates for 20 minutes, at intervals of 20 minutes
3 Drain pump operates continuously
EEPROM
setting
Effect
Delayed start is not performed (setting at time of factory shipment)
System address: Delay in seconds before start
2
1
0
3
Start after System address × 2 seconds
Start after System address × 3 seconds
Operating mode
Discharge temperature control value
Change method
Cooling
12
Enter shift value
for indoor EEPROM
setting “1C.”
Heating
50
Enter shift value
for indoor EEPROM
setting “1D.”
The method is the same as ordinary indoor unit discharge temperature shift.
<Reference> Indoor unit discharge temperature control
SM830195-01̲Mini VRF SYS.indb 20 SM830195-01̲Mini VRF SYS.indb 20 2011/12/20 16:31:05 2011/12/20 16:31:05