Mitsubishi Heavy Industries SCM71ZM-S1 Technical Manual page 237

(4) Check of anomalous operation data with the remote control
(a) In case of RC-EX3 remote control
[Operating procedure]
➀ On the TOP screen, touch the buttons in the order of "Menu" ➝ "Service setting" ➝ "Service & Maintenance" ➝
"Service password" ➝ "Set" ➝ "Error display" ➝ "Error history".
➁ When only one indoor unit is connected to the remote control, followings will be displayed.
1. When there is any anomaly: "Loading. Wait a while" is displayed, followed by the operation data at the occurrence
of anomaly. Contents of display
・ Error code
・ Number and data item
2. When there is no anomaly: "No anomaly" is displayed, and this mode is terminated.
➂ When two or more indoor units are connected to the remote control, followings will be displayed.
1. When there is any anomaly: If the unit having anomaly is selected on the "Select IU" screen, "Loading. Wait a
while" is displayed, followed by the operation data at the occurrence of anomaly.
Contents of display
・ Indoor unit No.
・ Error code
・ Number and data item
2. When there is no anomaly: "No anomaly" is displayed, ant this mode is terminated.
Note (1) When the number of connected units cannot be shown in a page, select "Next".
➃ If you press [RUN/STOP] button, the display returns to the TOP screen.
◎ If you touch "Back" button on the way of setting, the display returns to the last precious screen.
Note (1) When two remote controls are used to control indoor units, the check of anomaly operation data can be made on the master remote control only. (It
cannot be operated from the slave remote control.)
■ Anomaly operation data (Corresponding data may not be provided depending on models. Such items will not be displayed.)
Number
01
02
03
04
05
06
07
08
09
10
11
12
13
21
22
23
Details of Compressor protection status No. 33
24
No.
25
"0" Normal
26
"1" Discharge pipe temperature protection control
"2" Discharge pipe temperature anomaly
27
"3" Current safe control of inverter primary current
28
"4" High pressure protection control
29
"5" High pressure anomaly
30
"6" Low pressure protection control
31
"7" Low pressure anomaly
32
"8" Anti-frost prevention control
"9" Current cut
33
"10" Power transistor protection control
34
"11" Power transistor anomaly (Overheat)
35
"12" Compression ratio control
36
"13" Spare
37
"14" Dewing prevention control
38 "15" Current safe control of inverter secondary current
"16" Stop by compressor rotor lock
39
"17" Stop by compressor startup failure
Data Item
(Operation Mode)
(Set Temperature)
(Return Air Temperature)
(Remote Control Thermistor Tempeature)
(Indoor Heat Exchanger Thermistor / U Bend)
(Indoor Heat Exchanger Thermistor /Capillary)
(Indoor Heat Exchanger Thermistor /Gas Header)
(Indoor Unit Fan Speed)
(Frequency Requirements)
(Response Frequency)
(Pulse of Indoor Unit Expansion Value)
(Total Running Hours of The Indoor Unit)
(Supply Air Temperature)
(Outdoor Air Temperature)
(Outdoor Heat Exchanger Thermistor)
(Outdoor Heat Exchanger Thermistor)
(Compressor Frequency)
Contents of display
(High Pressure)
(Low Pressure)
(Discharge Pipe Temperature)
(Comp Bottom Temperature)
(Current)
(Target Super Heat)
(Super Heat)
(Discharge Pipe Super Heat)
(Protection State No. of The Compressor)
(Outdoor Unit Fan Speed)
(63H1 On/Off)
(Defrost Control On/Off)
(Total Running Hours of The Compressor)
(Pulse of The Outdoor Unit Expansion Valve EEVC)
(Pulse of The Outdoor Unit Expansion Valve EEVH)
Details of Compressor protection status No. 33
No. Contents of display
"0" Normal
"1" Discharge pipe temperature protection control
"2" Discharge pipe temperature anomaly
"3" Current safe control of inverter primary current
"4" High pressure protection control
"5" High pressure anomaly
"6" Low pressure protection control
"7" Low pressure anomaly
"8" Anti-frost prevention control
"9" Current cut
"10" Power transistor protection control
"11" Power transistor anomaly (Overheat)
"12" Compression ratio control
"13" Spare
"14" Dewing prevention control
"15" Current safe control of inverter secondary current
"16" Stop by compressor rotor lock
"17" Stop by compressor startup failure
Note(1) Operation data display on the remote control.
Data is dispalyed until canceling the protection control.
In case of multiple protections controlled, only the younger No. is displayed.
Note(2) Common item.
In heating mode.
During protection control by the command signal for reducing compressor
frequency from indoor unit, No. "4" is displayed.
In cooling and dehumidifying mode.
During protection control by the command signal for reducing compressor
frequency from indoor unit, No. "8" is displayed.
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Note(1) Operation data display on the remote control.
Data is dispalyed until canceling the protection control.
In case of multiple protections controlled, only the younger
Note(2) Common item.
In heating mode.
During protection control by the command signal for reduc
frequency from indoor unit, No. "4" is displayed.
In cooling and dehumidifying mode.
During protection control by the command signal for reduc
frequency from indoor unit, No. "8" is displayed.