Panasonic U-4LE2E5 Service Manual & Test Run Service Manual page 28

5. Outdoor Unit CCU (command controller
6. Outdoor Unit CCU (command controller unit) Control
unit) Control
(2) RAP Valve Kit
Operating
mode of
indoor unit
Stop
1
Fan (only)
Cooling
Heating
RAP valve kit state (ON/OFF) is displayed on "D" in DSBE column when the Checker software is used.
0：OFF
1：ON
In the case of special controls, the MOV performs a special operation.
For details, see "3. Special Control" under this section.
(3) Indoor Fan Speed Control
The CCU intervenes in fan control of the indoor unit according to the status of the operating mode.
The priority order of fan control by the CCU is higher than that of indoor units.
3-1. Dry mode
Indoor unit fan operated in the dry mode is controlled from the CCU as shown in the figure below.
+ 1.0 degrees Celsius
* DTi = ( Air intake temperature of indoor unit) - (Preset temperature by remote controller)
Operating Operating
mode of mode of
outdoor unit Compressor
Stop
Cooling
Operation
Stop
Heating
Operation
Stop
Cooling
Operation
Stop
Heating
Operation
Stop
Cooling
Operation
Stop
Heating
Operation
DTi
Preset fan speed by remote controller
Fan speed
In the case of thermostat ON : "L"
In the case of thermostat OFF : "LL"
Thermostat RAP valve kit
ON/OFF ON/OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF OFF
ON OFF
OFF
OFF
OFF
ON ON
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2WAY VRF SYSTEM
Mini VRF SYSTEM
Control Functions
Control Functions - Outdoor unit