Mitsubishi Electric PUHY-P200 Service Handbook page 79

(2) Outdoor unit (cooling, heating mode)
"HO" blinks on the remote controller
1. Protection function self-
holding cancelled
2. LEV1 fully closed
1. 52C1 OFF
2. Inverter output 0Hz
3. Outdoor fan Stop
4. All solenoid valve OFF
Cooling/dry operation
Refer to 2-(1), 2-(3)
Notes :
❉1 For about 3 minutes after turning on power source, address and group information of outdoor unit, indoor unit, and remote
controller are retrieved by remote controller, during which "HO" blinks on and off on remote controller. In case indoor unit is not
grouped to remote controller, "HO" display on remote controller continues blinking even after 3 minutes after turning on power
source.
❉2 Two trouble modes include indoor unit side trouble, and outdoor unit side trouble. In the case of indoor unit side trouble, error
stop is observed in outdoor unit only when all the indoor units are in trouble. However, if one or more indoor units are operating
normally, outdoor unit shows only LED display without undergoing stop.
❉3 The operation mode conforms to mode command by indoor unit. However, when outdoor unit is under cooling operation, the
operation of indoor unit will be prohibited even by setting indoor units under operation, or indoor unit under stopping or fan mode
to heating mode. Reversely when outdoor unit is being under heating operation, the same condition will be commenced.
Start
NO
Breaker
turned on
YES
Note: ❉1
Set indoor
address No. to remote
controller
NO
YES
2
From outdoor unit
NO
Operation
command
YES
Operation
mode
Cooling-only, Heating-only,
Cooling/heating mixed
Note: ❉2
YES
Error mode
NO
52C1 ON
Note: ❉3
Operation
mode
Heating operation
Refer to 2-(2)
Operation command to indoor unit
- 77 -
Normal operation
Trouble observed
Stop
Error stop
Outdoor unit LED error display
Protection function self-holding
Error command to indoor unit
To 1