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RHSXB04P50D
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Daikin RHSXB04P50D — инструкции по устранению неисправностей теплового насоса [40/68]

Daikin RHSXB04P30D [40/68] Troubleshooting

8 Faults and malfunctions

Installation and maintenance instructions

ROTEX HPSU compact Ultra RHSX(B)-D

Heat pump (indoor unit) with integrated heat accumulator

008.1444444_01 – 11/2018 – EN

8 Faults and malfunctions

DANGER: RISK OF ELECTROCUTION

Electrostatic charges can lead to voltage arcing that can

destroy the electronic components.

▪ Before touching the control panel PCB, ensure potential

equalisation.

8.1 Troubleshooting

The electronics of the indoor unit indicate an error by the status dis-

play lighting red, the error screen appearing on the display and the

error symbol appearing on the start screen.

Troubleshooting: Error code E90XX

An error reset can be performed. If the same error is displayed again

shortly, the cause of the error must be found and rectified by a spe-

cialist. In the meantime, emergency operation may be maintained.

Troubleshooting: Other error codes

The cause of the error must be found and rectified by a specialist. In

the meantime, emergency operation may be maintained.

8.2 Overview of possible malfunctions

Malfunction Possible cause Possible solution

System not working

(nothing on the display,

operation LED on Ro-

Con BM2C off)

No mains voltage

▪ Switch on the system's external main switch.

▪ Switch on system fuse(s).

▪ Replace system fuse(s).

Switching time pro-

grams are not operating

or programmed switch-

ing times are carried

out at the wrong time.

The date and time are not set correctly.

▪ Set the date.

▪ Set the time.

▪ Check the weekday to switching time assignment.

Incorrect operating mode set.

▪ Set the "Automatic 1" or "Automatic 2" operating mode

During a switching time the user made a manual set-

ting (e.g. changed the target temperature, changed

the operating mode)

1 Select the "Operating mode" menu [→Main menu →Oper-

ating mode].

2 Select the correct operating mode.

The controller does not

respond to inputs

The controller's operating system has crashed.

▪ RESET the controller. To do this, disconnect the system from

the power supply for at least 10s and then switch on again.

Operating data are not

updated

The controller's operating system has crashed.

▪ RESET the controller. To do this, disconnect the system from

the power supply for at least 10s and then switch on again.

Heating does not warm

Requirement heating mode shut off (e.g. switching

time program is in the economy phase, outside tem-

perature is too high, parameters for optional backup

heater (BUxx) incorrectly set, requirement for hot

water active)

▪ Check the operating mode setting.

▪ Check the request parameters.

▪ Check the date, time and switching time program settings on

the controller.

Refrigerant compressor is not working.

▪ With backup heater (BUxx) installed:

▪ Check that the backup heater heats the return flow temperat-

ure to at least 15°C (at a low return flow temperature, the

heat pump uses the backup heater first to achieve this min-

imum return flow temperature).

▪ Check mains supply of the backup heater (BUxx).

▪ Thermal contactor (STB) on the backup heater (BUxx) has

triggered. Unlock.

The system is in the "Cooling" operating mode.

▪ Switch the operating mode to "Heating".

Settings for low rate mains connection do not corres-

pond to settings for electrical connections.

▪ HT/NT function is active and the [HT/NT contact] parameter is

set incorrectly.

▪ Other configurations are also possible. However, these must

match the type of low rate mains connection.

▪ The parameter [Smart grid] is active and the connections are

set incorrectly.

The electricity company has sent the peak rate sig-

nal.

▪ Wait for the repeat off-peak rate signal which reactivates the

power supply.

Daikin RHSXB04P50D — инструкции по устранению неисправностей теплового насоса [40/68]

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