Service Functions - Mitsubishi Electric MXZ-2HA40VF Service Manual

11

SERVICE FUNCTIONS

MXZ-2HA40VF MXZ-2HA50VF MXZ-3HA50VF
11-1. THE POSITION OF SWITCH
<MXZ-2HA40VF/2HA50VF>
SW1
ON
Outdoor display P.C. board
<MXZ-3HA50VF>
CN750
CN751
Outdoor control
P.C. board
11-2. LOCKING THE OPERATION MODE OF THE AIR CONDITIONER (COOL, DRY, HEAT)
With this function, once the operation mode is locked to either COOL/DRY mode or HEAT mode, the air conditioner
operates in that mode only.
Changing the setting is required to activate this function. Explain about this function to your customers and ask them
whether they want to use it.
[How to lock the operation mode]
(1) Turn OFF the power supply and make sure that the LED goes off.
(2) Set SW1 as shown in the figure below.
(3) Turn ON the power supply.
<MXZ-2HA40VF/2HA50VF>
SW1 on the outdoor display P.C. board
Cool/Dry Heat
SW1 SW1
ON
OBH828A
SW2
ON
1 2 3 4 5 6
SW871
SW1
ON
1 2 3 4 5 6
SW2
ON
1 2 3 4 5 6
ON
<MXZ-3HA50VF>
SW1 on the outdoor control P.C. board
Cool/Dry Heat
SW1 SW1
ON
5 6
37
ON
5 6