Service Maintenance Functions - Sanyo CHDXR09663* Service Manual

17. Service Maintenance Functions

The outdoor unit EEPROM settings can be used for the following functions.
17-1. Outdoor Unit Noise Countermeasure: EEPROM 05 (set at each outdoor unit)
This unit includes 3 types of Quiet modes. (However, when they are engaged, operation is in Quiet mode 24 hours
a day.) Selecting a Quiet mode results in operation that gives priority to reducing noise. Because these modes
involve restrictions on outdoor unit fan modes and the operation frequency, the capacity will be somewhat reduced.
Setting Max. fan mode
1
0
1
2
3
* If Quiet mode is set, the capacity will begin to decrease during heating operation at low outdoor temperatures,
when the outdoor air temperature is below standard conditions.
17-2. Anti-slime countermeasures ... EEPROM setting 0C (set only on the main unit)
This setting controls the operation of the drain pump.
Setting
0 Normal control (setting at time of factory ship ment)
1 The drain pump operates for 20 minutes at 2-hour intervals.
2 The drain pump operates for 20 minutes at 20-minute intervals.
3 The drain pump operates constantly.
17-3. Delayed Start for Each System: Outdoor EEPROM 3E (set only on outdoor unit No. 1)
The operation start time can be delayed according to the set system addresses.
This setting reduces the voltage drop by preventing multiple systems from starting at the same time when opera-
tion is restarted after multiple operating systems were stopped due to a power outage or other cause.
Setting
0 No delayed start (setting at time of factory shipment)
1 Start begins after [1 second x System address]
2 Start begins after [2 seconds x System address]
3 Start begins after [3 seconds x System address]
17-4. Automatic Backup: Outdoor EEPROM 48 (set only on outdoor unit No. 1)
Automatic backup is set to occur at the time the unit is shipped from the factory. However, the automatic backup
function can be disabled by changing this setting to 1.
Normal operation (setting at time of
14
factory shipment)
Noise reduced by approx. 1 – 2 dB from
12
the catalog value.
Noise reduced by approx. 2 – 3 dB from
11
the catalog value.
Noise reduced by approx. 5 dB from the
10
catalog value.
Effect
Description
Effect
1 - 30
W-2WAY ECO-i SYSTEM
Control Functions
Amount of capacity reduction
0
Approx. 0.5 hp
Approx. 1.2 hp
Approx. 1.8 hp