Mitsubishi Electric CAHV-P500YB-HPB Service Handbook page 127

[ IX Troubleshooting ]
Maintenance item (1) list
Forcing the units in a specific system to stop
Outlet water temperature sensor correction (hot water)TH11
Outlet water temperature sensor correction (hot water)TH13
Inlet water temperature sensor correction (hot water)TH16
Inlet water temperature sensor correction (hot water)TH12
Representative water temperature sensor correction
(hot water)TH14
Representative water temperature sensor correction
(hot water)TH15
Built-in thermistor differential DIFF1
Built-in thermistor differential DIFF2
Cumulative operation time of the compressor
Cumulative operation time of the compressor
(Unit: 10,000 hours)
Temperature data collection interval (S seconds)
Multiple system Thermo-ON/OFF status check interval
Representative water temperature thermistor while the
"Temperature shift (Setting temperature A)" function is enabled.
Representative water temperature thermistor while the
"Temperature shift (Setting temperature B)" function is enabled.
Representative water temperature thermistor while the
"Temperature shift (Setting temperature C)" function is enabled.
Start/End time setting 1 Water temp setting
Start/End time setting 2 Water temp setting
Start/End time setting 3 Water temp setting
(Note1) Do not use this item. (Stop the units in a given system by setting the slide switch SWS1 to OFF.)
(Note2) Consult your nearest Mitsubishi representative if the sensors go off below the preset values.
(Note3) Consult your nearest Mitsubishi representative.
(Note4) These items can only be displayed. (Their settings cannot be changed.)
(Note5) The cumulative time between 1 and 9999 hours will be displayed in four digits. (unit: hour)
(Note6) Pressing the push switches SW01 and SW02 simultaneously while the time is displayed will reset (initialize) the data to 0.
(Note7) The cumulative time between 10,000 and 99,990,000 hours will be displayed in four digits (unit: 10000 hours)
(Note8) Set the data collection interval by referring to section "3. Operation status before error". (Page 117)
(Note9) The Thermo-ON/OFF status check interval can be adjusted to optimize the ON/OFF operation when the piping length to the load side is long and the
detection of changes in water temperature tends to lag behind.
(Note10) Set these settings when using both external thermistors TH14 and TH15 and switching between the two according to the preset water temperature.
(Heating temperature = A°C, Hot water temperature = B °C, Heating ECO temperature = C °C)
(Note11) Set these settings when changing the temperature settings for the units by using the schedule function of the control board.
(Heating temperature: 1 Hot water temperature: 2, Heating ECO temperature: 3)
HWE15070
Item Incre- Lower Upper
code ments limit limit
1004 1 0 3
1009 - - -
1010 - - -
1011 - - -
1012 - - -
1013 - - -
1014 - - -
1015 - - -
1016 - - -
1017 - - -
1018 - - -
1019 1 second 1 9999
1020 1 minute 1 5
1215 1 14 15
1216 1 14 15
1217 1 14 15
1218 1 1 3
1219 1 1 3
1220 1 1 3
- 120 -
Switch
Main unit
Default setting
timing
MAIN circuit SUB circuit MAIN circuit SUB circuit
0 ○
When unit is stopped
- - ○
- - -
- - ○
- - -
- - ○
- - ○
- - ○
- - ○
Can be reset
- only when unit ○
is stopped
Can be reset
only when unit
- ○
is stopped
60 When unit is stopped ○
1 ○
When unit is stopped
14 ○
When unit is stopped
14 ○
When unit is stopped
14 ○
When unit is stopped
1 ○
When unit is stopped
1 ○
When unit is stopped
1 ○
When unit is stopped
Unit type
Sub unit Notes
- ○ - (Note1)
- ○ -
○ - ○
- ○ -
(Note2)
○ - ○
- - -
- - -
○ ○ ○
(Note3)
○ ○ ○
(Note4)
(Note5)
○ ○ ○
(Note6)
(Note4)
(Note5)
○ ○ ○
(Note6)
(Note7)
○ ○ ○ (Note8)
- - - (Note9)
- - -
(Note10)
- - -
- - -
- - -
- - - (Note11)
- - -
GB