Service manual

ManualsBrandsMitsubishi Electric ManualsAir ConditionerEHPX Series

Note

Refer to outdoor unit service manual for request code 0 to 102, 106 to 149.

Request codes 103 to 105 indicate error histories of both indoor and outdoor units.

As only four digits can be displayed at one time the software version number is displayed in two halves.

Enter code 190 to see the ﬁ rst four digits and code 191 to see the last four digits.

For example software version No. 5.01 A000, when code 190 is entered 0501 is displayed, when code 191 is entered A000 is displayed.

Request

code

Request content Range Unit

103 Error history 1 (latest) Displays error history. ("– –" is displays if no history is present.) Code

104 Error history 2 (second to last) Displays error history. ("– –" is displays if no history is present.) —

105 Error history 3 (third to last) Displays error history. ("– –" is displays if no history is present.) —

154 Water circulation pump 1 - Accumulated operating time (after reset) 0 - 9999 10 hours

156 Water circulation pump 2 - Accumulated operating time (after reset) 0 - 9999 10 hours

157 Water circulation pump 3 - Accumulated operating time (after reset) 0 - 9999 10 hours

162 Indoor unit - Dip SW1 setting information Refer to detail contents described hereinafter. —

163 Indoor unit - Dip SW2 setting information Refer to detail contents described hereinafter. —

164 Indoor unit - Dip SW3 setting information Refer to detail contents described hereinafter. —

165 Indoor unit - Dip SW4 setting information Refer to detail contents described hereinafter. —

175 Indoor unit - Output signal information Refer to detail contents described hereinafter. —

176 Indoor unit - Input signal information Refer to detail contents described hereinafter. —

177 Mixing valve opening step 0 - 10 Step

190 Indoor unit - Software version 1st 4 digits Refer to Note below. —

191 Indoor unit - Software version last 4 digits Refer to Note below. —

340 Water circulation pump 1 - Accumulated operating time reset — —

342 Water circulation pump 2 - Accumulated operating time reset — —

343 Water circulation pump 3 - Accumulated operating time reset — —

504 Indoor unit - Zone 1 room temp. (TH1A) –39 - 88 °C

505 Indoor unit - Ref. liquid temp. (TH2) –39 - 88 °C

506 Indoor unit - Return water temp. (THW2) –39 - 88 °C

507 Indoor unit - Zone 2 room temp. (TH1B) –39 - 88 °C

508 Indoor unit - DHW tank water temp. (THW5) –39 - 88 °C

509 Indoor unit - Zone 1 ﬂ ow water temp. (THW6) –39 - 88 °C

510 Indoor unit - Outside air temp. (TH7) –39 - 88 °C

511 Indoor unit - Flow water temp. (THW1) –39 - 88 °C

512 Indoor unit - Zone 1 return water temp. (THW7) –39 - 88 °C

513 Indoor unit - Zone 2 flow water temp. (THW8) –39 - 88 °C

514 Indoor unit - Zone 2 return water temp. (THW9) –39 - 88 °C

515 Indoor unit - Boiler flow water temp. (THWB1) –40 - 140 °C

516 Indoor unit - Boiler return water temp. (THWB2) –40 - 140 °C

550 Indoor unit - Error postponement history 1 (latest)

Displays postponement code.

("– –" is displays if no postponement code is present.)

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551 Indoor unit - Operation control at time of error 0 Standard, 1 Heater, 2 Boiler —

552

Indoor unit - Operation mode at time of error 0 OFF, 1 DHW, 2 Heating, 3 Cooling 4, Legionella prevention,

5 Freeze protection, 6 Operation stop

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553 Indoor unit - Output signal information at time of error Refer to detail contents described hereinafter —

554 Indoor unit - Input signal information at time of error Refer to detail contents described hereinafter —

555 Indoor unit - Zone 1 room temp. (TH1A) at time of error –39 - 88 °C

556 Indoor unit - Zone 2 room temp. (TH1B) at time of error –39 - 88 °C

557 Indoor unit - Ref. liquid temp. (TH2) at time of error –39 - 88 °C

558 Indoor unit - Flow water temp. (THW1) at time of error –39 - 88 °C

559 Indoor unit - Return water temp. (THW2) at time of error –39 - 88 °C

560 Indoor unit - DHW tank water temp. (THW5) at time of error –39 - 88 °C

561 Indoor unit - Zone 1 flow water temp. (THW6) at time of error –39 - 88 °C

562 Indoor unit - Zone 1 return water temp. (THW7) at time of error –39 - 88 °C

563 Indoor unit - Zone 2 flow water temp. (THW8) at time of error –39 - 88 °C

564 Indoor unit - Zone 2 return water temp. (THW9) at time of error –39 - 88 °C

565 Indoor unit - Boiler flow water temp. (THWB1) at time of error –40 - 140 °C

566 Indoor unit - Boiler return water temp. (THWB2) at time of error –40 - 140 °C

567

Indoor unit - Failure (P1/P2/L5/L8/Ld) thermistor 0 Failure thermistor is none, 1 TH1A, 2 TH2, 3 THW1, 4 THW2,

5 THWB1, 6 THW5, 7 THWB2, 8 TH1B, A THW6, B THW7,

C THW8, D THW9

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568 Mixing valve opening step at time of error 0 - 10 Step

569

Operated Flow switch at time of failure (L9) 0 No operated flow switch, 1 Flow switch 1, 2 Flow switch 2,

3 Flow switch 3

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OCH532A