Backup Setup For Outdoor Unit During Cooling Season - Toshiba Super MMU-AP0091H Service Manual

11-4. Backup Setup for Outdoor Unit during Cooling Season

<Outline>
Restricted to a case unnecessary to operate the air system in HEAT mode in cooling season, etc, this function
enables the backup operation to operate quickly by omitting various setups even when the header unit or
follower unit has mal-functioned.
This backup operation is same as that of the abovementioned "Outdoor Unit Backup Setup" except that it cannot
operate in HEAT mode.
Note 1) When this function is set up, a heating operation is unavailable.
(HEAT mode cannot be selected on the remote controller.)
Note 2) If a trouble occurred on the interface P .C. board or the electric cycle system, the backup operation
cannot be performed by this setup. In this case, execute the abovementioned "Outdoor Unit Backup
Setup".
<Work procedure>
1. Turn off the main power supplies of all the units connected to the system.
[Setup for outdoor unit with trouble]
(The following procedure is common even if the outdoor unit with trouble is the header or follower unit.)
2. Turn on both Bit 1 and 2 of the SW06 on the interface P .C. board.
3. Close fully the service valve of the liquid pipe when there is leakage of outdoor PMV (PMV does not close.).
4. Turn on the main power supplies of all the units connected to the system.
If the trouble is a compressor insulation error and others, remove the wiring to the compressor before turning
on the power supply.
Then, the backup setup for the outdoor unit in cooling season has finished.
Turn on Bit 1 and Bit 2 of Dip SW06.
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