Page 46
MS8C / MS8H (208-230V)
OUTDOOR COIL HIGH TEMPERATURE PROTECTION
FIGURE 61
COMMUNICATION FAULT (E6)
If either the indoor or outdoor controls are unable to communicate with each other for a minimum of three minutes, the system
will stop and an error code is displayed on the indoor unit.
OUTDOOR UNIT CONTROL PROTECTION
When excessive temperature is sensed at the outdoor unit control, the compressor will stop. The compressor anti-short cycle
routine will be implemented and the compressor will not resume operation until the 3-minute time period has ended.
OTHER FUNCTIONS
SYSTEM REFRIGERANT RECOVERY FUNCTION (PUMP DOWN SYSTEM REFRIGERANT INTO OUTDOOR UNIT)
Enter Refrigerant Recovery Mode
1. Set all zone remote controls at 61ºF (16ºC) in the cooling mode.
2. Within five (5) minutes of system cooling operation, press remote control
LIGHT
button three (3) times consecutively
within three (3) seconds.
3. The system will enter refrigerant recover mode. Indoor display will indicate
Fo
, indoor fan will run on high speed and
the louver position will be adjusted.
Exit Refrigerant Recovery Mode
1. If remote control cooling mode setting is changed or refrigerant recovery mode has lasted longer than 25 minutes the
system will exit this mode.
2. The indoor fan will run at the last setting before the system was placed in refrigerant recovery mode.
INDOOR MODE CONFLICT PROTECTION (E7)
When different modes of operation are being called by various indoor units:
1. Basic Mode: The first indoor unit to make a call for cooling or heating will established what is considered basic mode
for the outdoor unit operation. Cooling mode is a conflict with heating mode. Indoor units in conflict with first zone call
will display
E7
on the front panel.
2. When the outdoor unit's basic mode is set to heating, then any request for fan mode at a indoor unit is made will be
ignored. Even when the first unit to operate is in fan mode, if any other indoor unit makes a call for heating, the basic
mode will be for heating. Fan mode is a conflict with heating mode.
