Mitsubishi Electric CMB-PW202V-J Service Handbook page 56

[ VI Control ]
(2) Outdoor unit (cooling only, heating only, cooling main and heating main modes)
"HO" / "PLEASE WAIT" blinks
on the remote controller
Protection function
self-holding cancelled.
1. 52C1 4-way valve OFF
2. Inverter output 0Hz
3. Fan stop
4. All solenoid valves OFF
*Note 1. For about three minutes after power on, a search for the outdoor unit address, WCB address, indoor unit
address, remote controller address, and group information will start. During the search,
"HO"/ "PLEASE WAIT" blinks on the display of the remote controller. When the indoor unit to be controlled
by the remote controller is missing, "HO"/ "PLEASE WAIT" keeps blinking on the display of the remote
controller, even after three or more minutes have passed after power on.
*Note 2. The system may go into the error mode on the indoor unit, WCB, or outdoor unit side. The outdoor units will stop
only when all of the connected indoor units are experiencing a problem. If at least one of the indoor units is in
normal operation, the outdoor unit will continue in operation, displaying an error code on the LED.
*Note 3. The units will follow the operation mode commands from WCB.
*Note 4. When the operation mode commands from WCB are mixed (both cooling and heating), the actual operation mode
(Cooling-main or Heating-main) is determined by the outdoor unit.
HWE09070
Start
Breaker
turned on
YES
*Note 1
Indoor units
registered to the
remote controller
NO
YES
2
NO
Operation
command
YES
fan
Operation
mode
*Note 2
Error mode
NO
52C1 ON
*Note 3
Operation
mode
Cooling Only Heating Only
Operation command to the WCB
2
NO
Cooling only, Heating only
Mixture of units in cooling and heating
YES
Mixture of units in cooling and heating
*Note 4
Operation
mode
Cooling Main Heating Main
- 47 -
Normal operation
Error
Unit in the stopped state
Error stop
Error display on
the outdoor unit LED
Self-holding of
protection function
Operation command
to the WCB
GB