Service manual

ManualsBrandsMitsubishi Electric ManualsAir ConditionerEHPX Series

SERVICE AND MAINTENANCE

The main controller settings changed from the default settings are reset by replacing the controller board. To facilitate reselecting settings on the main controller, it is

recommended to write down the changes in the sheet below before replacement.

13-1. Engineers Forms (1/2)

Should settings be changed from default, please enter and record new setting in ‘Field Setting’ column. This will ease resetting in the future should the system use

change or the circuit board need to be replaced.

Commissioning/Field settings record sheet

Main controller screen Parameters

Default setting

Field

setting

Notes

Main Zone1 heating room temp 10°C - 30°C 20°C

Zone2 heating room temp *1 10°C - 30°C 20°C

Zone1 heating ﬂ ow temp 25°C - 60°C 45°C

Zone2 heating ﬂ ow temp *1 25°C - 60°C 35°C

Cooling ﬂ ow temp *2 5°C - 25°C 15°C

Zone1 heating compensation curve −9°C - + 9°C 0°C

Zone2 heating compensation curve *1 −9°C - + 9°C 0°C

Holiday mode Active/Non active/Set time –

Option Forced DHW operation On/Off –

DHW On/Off/Timer On

Heating On/Off/Timer On

Holiday mode Active/Non active/Set time –

Setting DHW *3 Operation mode Normal/Eco Normal

DHW max. temp. 40°C - 60°C 50°C

DHW temp. drop 5°C - 30°C 10°C

DHW max. operation time 30 - 120 mins 60 mins

DHW mode restriction 30 - 120 mins 30 mins

Legionella prevention *3 Active Yes/No Yes

Hot water temp 60°C - 70°C 65°C

Frequency 1 - 30 days 15 days

Start time 00.00 - 23.00 03.00

Max. operation time 1 - 5 hours 3 hours

Duration of maximum temp. 1 - 120 mins 30 min

Heating/Cooling *2 Zone1 operation mode Heating room temp/Heating ﬂ ow temp/Heating

compensation curve/Cooling ﬂ ow temp

Room temp

Zone2 operation mode *1 Heating room temp/Heating ﬂ ow temp/Heating

compensation curve

Compensation

curve

Compensation

curve

Hi set point Zone1 outdoor ambient temp −15°C - +35°C –15°C

Zone1 ﬂ ow temp 25°C – 60°C 50°C

Zone2 outdoor ambient temp *1 −15°C - +35°C –15°C

Zone2 ﬂ ow temp *1 25°C - 60°C 40°C

Lo set point Zone1 outdoor ambient temp −15°C - +35°C 35°C

Zone1 ﬂ ow temp 25°C - 60°C 25°C

Zone2 outdoor ambient temp *1 −15°C - +35°C 35°C

Zone2 ﬂ ow temp *1 25°C - 60°C 25°C

Adjust Zone1 outdoor ambient temp −14°C - +34°C —

Zone1 ﬂ ow temp 25°C - 60°C —

Zone2 outdoor ambient temp *1 −14°C - +34°C —

Zone2 ﬂ ow temp *1 25°C - 60°C —

Holiday DHW *3 Active/Non active Non active

Heating/Cooling *2 Active/Non active Active

Zone1 heating room temp 10°C - 30°C 15°C

Zone2 heating room temp *1 10°C - 30°C 15°C

Zone1 heating ﬂ ow temp 25°C - 60°C 35°C

Zone2 heating ﬂ ow temp *1 25°C - 60°C 25°C

Cooling ﬂ ow temp *2 5°C - 25°C 25°C

Initial settings Language

ENG/FR/GER/SW/SP/IT/DA/NL/FIN/NOR/PT ENG

°C/°F

°C/°F °C

Temp. display

Room/DHW tank/Room&DHW tank /Off Off

Time display

hh:mm/hh:mm AM/AM hh:mm hh:mm

Room sensor settings for Zone1

TH1/Main RC/Room RC1-8/“Time/Zone” TH1

Room sensor settings for Zone2 *1

TH1/Main RC/Room RC1-8/“Time/Zone” TH1

Room RC zone select *1

Zone1/Zone2 Zone1

*1 The settings related to Zone2 can be switched only when Zone2 temperature control is enabled (when Dip SW2-6 and SW 2-7 are ON).

*2 Cooling mode settings are available for ERSC-VM2B only.

*3 Only available if DHW tank present in system.

OCH532A