Mitsubishi Electric PQHY-P72ZLMU-A Service Handbook page 383

[ X LED Monitor Display on the Heat source Unit Board ]
How to convert HP capacity to Model name /Ton
HP capacity is the capacity of outdoor unit that is shown on LED display at initial setting.
Please refer to the following table to convert from HP capacity to Model name/Ton.
HP Model
8 P72
10 P96
12 P120
16 P144
18 P168
20 P192
22 P216
3. Time data storage function
The heat source unit has a simple clock function that enables the unit to calculate the current time with an internal timer by receiving
the time set by the system controller, such as AG-150A.
If an error (including a preliminary error) occurs, the error history data and the error detection time are stored into the service memory.
The error detection time stored in the service memory and the current time can be seen on the service LED.
1) Use the time displayed on the service LED as a reference.
2) The date and the time are set to "00" by default. If a system controller that sets the time, such as AG-150A is not connected, the
elapsed time and days since the first power on will be displayed.
If the time set on a system controller is received, the count will start from the set date and the time.
3) The time is not updated while the power of the heat source unit is turned off. When the power is turned off and then on again, the
count will resume from the time before the power was turned off. Thus, the time that differs the actual time will be displayed. (This
also applies when a power failure occurs.)
The system controller, such as AG-150A, adjusts the time once a day. When the system controller is connected, the time will be
automatically updated to the correct current time after the time set by the system controller is received. (The data stored into the
memory before the set time is received will not be updated.)
(1) Reading the time data:
1) Time display
Example: 12 past 9
2) Date display
When the main con-
troller that can set the
time is connected
Example: May 10,
2003
When the main con-
troller that can set the
time is not connected
Example: 52 days af-
ter power was turned
on
HWE15150
Ton HP Model
6.0 24 P240
8.0 28 P264
10.0 30 P288
12.0 32 P312
14.0 34 P336
16.0 36 P360
18.0
* Disappears if the time data is deviated due to a power failure, or if a
system controller that sets the time is not connected.
Alternate display of year and month, and date
* Appears between the year and the month, and nothing appears
when the date is displayed.
* Appears between the year and the month, and nothing
appears when the date is displayed.
- 374 -
Ton
20.0
22.0
24.0
26.0
28.0
30.0
Alternate display
Alternate display
Day count
GB