Page 1 Manual No.'22・HM-T-419 TECHNICAL MANUAL AIR TO WATER HEAT PUMP Q-ton Natural refrigerant CO water heater Including hot water recirculation system ESA30EH2-25...
Page 2 '22 • HM-T-419 CONTENTS 1. GENERAL DESCRIPTION ................4 1.1 Mechanism of CO heat pump water heater for commercial use ... 4 1.2 As for hot water storage unit ..............5 1.3 About ECO MODE ..................5 1.4 CO heat pump water heater: Operation chart .......... 6 1.5 Feature of natural refrigerant CO ..............
Page 3 '22 • HM-T-419 (8) Control setting ..................101 (9) Commissioning and handover ............. 105 (10) Inspection report .................. 106 (11) Notabilia for servicing (for CO heat pump water heater) ....108 (12) Connection to existing cylinder ............112 (13) The behavior after power recovery ............. 113 (14) Recirculation hot water supply system ..........
Page 4 4.12 When power off in multiple unit system ..........237 4.13 Additional information for tank temperature sensor connection ..239 ◦ Compatibility Compatibility with previous models This model Previous models Function Overview ESA30EH2-25 ESA30EH-25 ESA30E-25 Space Weekly timer for heating ○ ○ × ×...
Page 5 '22 • HM-T-419 1. GENERAL DESCRIPTION 1.1 Mechanism of CO heat pump water heater for commercial use • The CO heat pump water heater for commercial use is a water hater that is composed of a heat pump unit with natural refrigerant such as CO which can produce hot sanitary water with heat pump technology and a hot water storage unit which can store hot water.
Page 6 '22 • HM-T-419 1.2 As for hot water storage unit Heat pump water heater can be connected to an unvented hot water storage cylinder and it is applicable to various type of hot water supply system. Unvented hot water storage cylinder Operation Hot water to top up...
Page 7 '22 • HM-T-419...
Page 8 '22 • HM-T-419 1.5 Feature of natural refrigerant CO (1) General characteristics The general characteristics of CO is as follows. Under the atmospheric pressure, since CO is gaseous state and has following characteristics, be careful to handle it. a) It is colorless and odorless gas, but when interacting with water, it produces mild acidity and irritating odor. b) When dissolving it with water, it will be mild acidic and may cause metal to corrode.
Page 9 '22 • HM-T-419 (2) Characteristics of CO refrigerant refrigerant is so called R744 and its physical property and saturated vapor pressure at each temperature are shown in table 1.2. For comparison purpose, it is shown in contrast with those of R410A refrigerant generally using for current air-conditioners. Table 1.2 Physical property and saturated vapor pressure of refrigerant Item (R744)
Page 10 '22 • HM-T-419 (3) Handling precaution of CO refrigerant Regarding the safety considerations to high pressure, be careful not to give any damage on the refrigerant circuit piping of heat pump water heater during servicing, and to purge a small amount of the refrigerant gradually by adjusting valve open- ing properly to a place where there is no person.
Page 11 '22 • HM-T-419 2. SPECIFICATIONS 2.1 Specifications of product (1) Heat pump water heater Model ESA30EH2-25 Item Power source － 3 Phase 380V±5%, 400V±5%, 415V±5%, 50/60Hz Heating capacity 30.0 (Water amount) L/min 8.97 Operation to top up (In intermediate season)* (Power consumption) 6.98...
Page 12 '22 • HM-T-419 (Notes) 1. Performance of operation to top up in intermediate season shows the capacity measured under the conditions that outdoor air temperature is 16°C DB/12°C WB, water inlet temperature is 17°C and hot water outlet temperature is 65°C . 2.
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Page 14 '22 • HM-T-419 (b) List of setting functions Setting and display item Detailed content 1. Remote control network Multiple heat pump water heater control Max. 16 sets of heat pump water heaters in one Superlink network can be connected to one remote control and controlled by it. Heat pump water heaters address needs to be set.
Page 15 '22 • HM-T-419 Setting and display item Detailed content 5. Administrator settings Administrator password is required 1 Enable/Disable setting ●Permission/prohibition setting of the following operations can be set. [Run/Pause], [Setting of HW temp.], [Change amount of top up], [Manual operation to fill up], [Setting of schedule], [Select the language], [Heating operation], [Heating set temp] 2 Night tariff setting In order to calculate the power consumption in day/night time, the time zone...
Page 16 '22 • HM-T-419 (c) Setting method of remote control for heat pump water heater [At the initial use] 1) After the completion of installation, check that the feed water is surely supplied to the hot water supply system firstly and then turn the power ON.
Page 17 '22 • HM-T-419 5) When starting the primary setting of operation, the message of “In Primary operation” [Screen 5-1] is displayed on the TOP screen (Screen 5-1). When completing the primary setting of operation, the heat pump water heater is stopped and the message of “In primary operation”...
Page 18 '22 • HM-T-419 b) Set the time period for the operation to fill up ① When pushing Schedule setting switch, [Setting of schedule] menu screen is displayed. (Screen ② -1) ② When tapping [Setting of weekly operation pattern], the [Weekly timer] screen is displayed. Tap All days buttom. (Screen ② -2) The screen for confirming the set contents is displayed (Screen ②...
Page 19 '22 • HM-T-419 c) Set the hot water amount ① Carry out the same procedure as [(2)- ① and ② ] and display the screen for confi rming the set contents. (Screen ② -3) When tapping Next button, the screen for confi rming the set content of next time period. (Screen ③ -1) ②...
Page 20 '22 • HM-T-419 ⑥ After the each setting is done, the detail setting screen is displayed. Tap the Set button. (Screen ④ -7) ⑦ Since the [Setting contents confi rmation] screen is displayed, tap the Set button.(Screen ④ -8) ⑧ Group setting acknowledge screen is displayed. Tap the Yes button. (Screen ④ -9) [Screen ④...
Page 21 '22 • HM-T-419 [Operation pattern of heat pump water heater] When setting like ① to ④ mentioned above, the set hot water amount at each time of the day is shown as follows. ① Fill up hot water from 23:00 to 7:00 ③...
Page 22 '22 • HM-T-419 g) Silent mode Silent mode on weekly basis can be set. Push the Schedule setting switch on the panel. The menu screen of [Setting of schedule] is displayed. Tap the [Silent mode setting] The selection screen of [Silent mode setting] is displayed.
Page 23 '22 • HM-T-419 The [Checking of current set contents] screen is displayed. When changing or adding the setting contents, ① select the column of the setting No. to be changed ② and tap Change button. ■ The setting contents displayed may differ depending on the set day selected ( ☞...
Page 24 '22 • HM-T-419 The [Checking of set contents] screen is displayed ( ☞ Go to When tapping Set button, the set contents are confirmed and [Checking of set contents on the day] screen is displayed. ( ☞ Go to 6) If changing or adding the setting contents on the same day continuously, please start the work from 6.
Page 25 '22 • HM-T-419 h) Legionella Push the Schedule setting switch on the panel. The menu screen of [Setting of schedule] is displayed. Tap the [Legionella mode setting] The detail screen of [Legionella mode setting] is displayed. ① S witch the setting [Valid] ⇔ [Invalid] by tapping Valid/Invalid button ②...
Page 26 '22 • HM-T-419 Set the [Start time] ▲ ▼ Set the Hour/Minute by tapping buttons. The [Start time] can be set at 5-minute intervals. After setting the time, tap Set button. The detail screen of [Legionella mode setting] is displayed. Tap the desired interval.
Page 27 '22 • HM-T-419 2.2 Exterior dimensions (1) Heat pump water heater Model : ESA30EH2-25 PCM000Z107...
Page 28 MTH-Q4E MTH-Q5E '22 • HM-T-419 　PART NAME：3 WAY VALVE（CWFV3）　PART NAME：　PART No.　：SSA482B052 　PART No.　： (2) MTH-Q4E,MTH-Q8E (Option part) Nominal Diameter：20A（3／4） Nominal Diam PART NAME : 3-WAY VALVE (CWFV2, 3) MTH-Q4E(CWFV3) : For anti-freezing IP code　　： IP code　　：IP56（Indoor specifications） MTH-Q8E(CWFV2) : For return hot water control 54.5 PART No.
Page 29 '22 • HM-T-419 MTH-Q5E (3) MTH-Q5E 　PART NAME：2 WAY VALVE（CWFV5） PART NAME : 2-WAY VALVE (CWFV5) 　PART No.　：SSA482A029 PART No. : SSA482A029 Nominal Diameter : 32A (1 1/4) Nominal Diameter：32A（1 ／） IP code : IP56 (Outdoor use allowed) IP code　　...
Page 30 '22 • HM-T-419 2.3 Inner structure Heat pump water heater Low pressure sensor PSL1 Intermediate pressure sensor PSM1 High pressure sensor PSH1 High pressure switch 63H1-1 Electronic expansion valve EEVH2 Electronic expansion valve EEVH1 Electronic expansion valve EEVG1 Receiver Control PCB High pressure side service valve Low pressure side service valve Terminal block for...
Page 31 '22 • HM-T-419 Without transformer Air purge valve Flow regulator CWFV1 Inter cooler Gas cooler Hot water outlet Water pump Drain water outlet Drain valve Feed water inlet Rear view • In this figure, the mounting position of the power transformer is not shown . (Please refer next page.)
Page 32 '22 • HM-T-419 Power transformer Rear view • The mounting position of the power transformer is shown in above figure.
Page 33 '22 • HM-T-419...
Page 34 '22 • HM-T-419 2.5 Electrical wiring...
Page 35 '22 • HM-T-419 2.6 Hot water system performance table for the operation to top up with recirculation loop (1) Hot water performance table (a) Hot water outlet temperature: 60˚C Hot water outlet temperature: 60˚C Heating capacity Power consumption Feed water temperature Outdoor air temperature ―...
Page 36 '22 • HM-T-419 (c) Hot water outlet temperature: 70˚C Hot water outlet temperature: 70˚C Heating capacity Power consumption Feed water temperature Outdoor air temperature ― 25˚C 30.0 5.40 16˚C 30.0 4.65 7˚C 30.0 3.98 2˚C 30.0 10.9 2.76 5˚C -7˚C 30.0 10.8 2.79...
Page 37 '22 • HM-T-419 (e) Hot water outlet temperature: 90˚C Hot water outlet temperature: 90˚C Heating capacity Power consumption Feed water temperature Outdoor air temperature ― 25˚C 30.0 3.46 16˚C 30.0 3.34 7˚C 30.0 3.25 2˚C 30.0 11.5 2.61 5˚C -7˚C 30.0 11.0 2.73...
Page 38 '22 • HM-T-419 (2) Hot water performance curve for the operation to top up (a) Hot water outlet temperature: 60°C 5-30℃ Relative humidity of performance characteristics Outdoor air temperature（℃DB） Notes 1) Performance characteristics are based on the relative humidity mentioned above. 2) System performance may vary according to climate and system conditions.
Page 39 '22 • HM-T-419 (b) Hot water outlet temperature: 65°C 5-30℃ Relative humidity of performance characteristics Outdoor air temperature（℃DB） Notes 1) Performance characteristics are based on the relative humidity mentioned above. 2) System performance may vary according to climate and system conditions.
Page 40 '22 • HM-T-419 (c) Hot water outlet temperature: 70°C 5- 30℃ Relative humidity of performance characteristics Outdoor air temperature（℃DB） Notes 1) Performance characteristics are based on the relative humidity mentioned above. 2) System performance may vary according to climate and system conditions.
Page 41 '22 • HM-T-419 (d) Hot water outlet temperature: 80°C 5-30℃ Relative humidity of performance characteristics Outdoor air temperature（℃DB） Notes 1) Performance characteristics are based on the relative humidity mentioned above. 2) System performance may vary according to climate and system conditions.
Page 42 '22 • HM-T-419 (e) Hot water outlet temperature: 90°C 5- 24℃ Relative humidity of performance characteristics Outdoor air temperature（℃DB） Notes 1) Performance characteristics are based on the relative humidity mentioned above. 2) System performance may vary according to climate and system conditions.
Page 43 '22 • HM-T-419 (3) Performance table for hot water operation with recirculation loop For the operation to top up, refer to the hot water performance table in section 2.6 (1) and (2). In case of systems with recirculation loop there is the risk of having a decrease in capacity due to high inlet water tempera- ture into the heat pump water heater (inlet temp ≥40ºC).
Page 44 '22 • HM-T-419 (b) In case of temperature set to 70°C Power Water flow Hot water outlet Setting temperature:70°C Capacity consumption volume temperature Feed water inlet Outdoor air L/min °C temperature temperature 25°C 13.6 2.48 16°C 23.3 2.78 11.4 7°C 24.8 10.9 2.27...
Page 45 '22 • HM-T-419 (c) In case of temperature set to 90°C Power Water flow Hot water outlet Setting temperature:90°C Capacity consumption volume temperature Feed water inlet Outdoor air L/min °C temperature temperature 25°C 11.0 1.90 16°C 17.2 2.01 7°C 22.4 11.0 2.03 2°C...
Page 46 '22 • HM-T-419 (4) Hot water performance curve for systems with recirculation loop (a) In case of temperature set to 65°C Broken line:Capacity Feed water inlet temperature:40 ℃ Solid line：COP 40℃ 50℃ 55℃ ℃ 60℃ 50℃ 60℃ ℃ Hot water temperature ＞65℃ Water flow volume:17L/min -25 -20 -15 -10 Outdoor air temperature (℃DB)
Page 47 '22 • HM-T-419 (b) In case of temperature set to 70°C Broken line: Capacity Feed water inlet temperature:40 ℃ Solid line：COP 40℃ 50℃ 55℃ 60℃ 50℃ 55℃ 60℃ ℃ Hot water temperature ＞70℃ Water flow volume:17L/min -25 -20 -15 -10 -5 Outdoor air temperature [℃] Relative humidity of performance characteristics Outdoor air temperature（℃DB）...
Page 48 '22 • HM-T-419 (c) In case of temperature set to 90°C Broken line: Capacity Solid line：COP 40℃ Feed water inlet temperature:40˚C 50℃ 55℃ 50℃ 55℃ 60℃ ℃ 60℃ -25 -20 -15 -10 Outdoor air temperature [℃] Relative humidity of performance characteristics Outdoor air temperature（℃DB）...
Page 49 '22 • HM-T-419 Performance correction method by the effects of outdoor relative humidity 2.7 Performance correction method by the effects of outdoor relative humidity 0.80 correction coefficient zone Example1 0.85 correction coefficient zone 0.90 correction coefficient zone 0.95 correction coefficient zone Example2 1.0 correction coefficient zone （No correctiion）...
Page 50 '22 • HM-T-419 2.8 Operation sound Model: ESA30 series (50/60Hz) Measurement condition: Hot water operation to top up in intermediate season Outdoor air temperature: 16°CDB/12°CWB Feed water inlet temperature: 17°C Hot water outlet temperature: 65°C (JRA 4060) Mike position: 1m in front and 1m in height (1) Sound power level Mid octave band frequency (Hz)
Page 51 '22 • HM-T-419 (2) Sound pressure level Mid octave band frequency (Hz)
Page 52 '22 • HM-T-419 Measurement condition: Hot water operation to top up in colder climate Outdoor air temperature: 2°CDB/1°CWB Feed water inlet temperature: 5°C Hot water outlet temperature: 65°C (JRA 4060) Mike position: 1m in front and 1m in height (1) Sound power level Mid octave band frequency (Hz)
Page 53 '22 • HM-T-419 (2) Sound pressure level Mid octave band frequency (Hz)
Page 54 '22 • HM-T-419 2.9 Control (1) Functional components for refrigerant cycle Symbol Name of component Function Details Inverter scrotary compressor The compressor speed is controlled to maintain nominal heating capacity according to the outdoor air temperature, feed water inlet temperature and hot water outlet temperature set by remote control.
Page 55 '22 • HM-T-419 (2) Functional components for water cycle Symbol Name of component Function Details DCWP Water pump DCWP is controlled to adjust the hot water outlet temperature to the set temperature set through remote control. Page62 DCWP is used for anti-freeze control of the water pipe. Page63 Control range of pump rotation speed: 2000-4000min As for the control details, please refer to [Water flow volume control] and...
Page 56 '22 • HM-T-419 (3) Control of refrigerant piping system (3)-1 Defrost control In order to recover from dropping the heating capacity for producing hot water due to the frost on the air heat exchanger of heat pump water heater, defrost operation is done periodically. By cutting jumper wire (J15), it can switch from normal defrost control to defrost priority control*1 *1.
Page 57 Drain pan Drainage valve Sub-cooling Sub-cooling coil coil （DH）（DH） Drain hose Drain hose SV-INJ1:Close Drain pan Drain pan EEVG1:Close EEVH1:Close heater（DH） SV-OIL1:Close heater（DH） EEVH2:Close Drain pan heater（DH） [Water circuit] CWFV3 CWFV5 ESA30EH2-25 Open Form C Water is circulating Feed water...
Page 58 '22 • HM-T-419 (3)-2 Gas injection control <Gas injection circuit> Low pressure Gas-cooler sensor（PSL1） refrigerant Check valve temp sensor Discharge pipe （inlet） temperature （Tho-G1） sensor （Tho-D1） Injection inlet separator Suction pipe Compressor temperature sensor temperature （Tho-INJ1） sensor （Tho-S1） Strainer Inter cooler Crankcase Accumulator...
Page 59 '22 • HM-T-419 2) Anomalous stop control a) If the discharge pipe temperature exceeds the set value shown in the following figure, compressor is stopped. b) If this anomalous stop happens 3 times within 100 minutes, [E36] is displayed on the remote control and it becomes error stop mode.
Page 60 '22 • HM-T-419 (3)-5 Low pressure protection control 1) Protection control If low pressure (detected by low pressure sensor PSL1) becomes below the set value shown in the following figure, compressor speed is controlled to suppress the decrease of low pressure. Reduce rps for every 30 seconds Release 1.2MPa...
Page 61 '22 • HM-T-419 1) - 2 Current safe control by inverter secondary current a) Starting condition If all of the following conditions are satisfied; ① Compressor is ON ② Except that the actual rps is kept on decreasing or it is within 1 second after the actual rps decreased. ③...
Page 62 '22 • HM-T-419 (3)-9 Detection of temperature or pressure sensors disconnection 1) Starting condition If one of following conditions is satisfied; ① Outdoor air temperature sensor, Heat exchanger temperature sensors, Intermediate receiver inlet temperature sensor, Suction pipe temperature sensor, Gas cooler water temperature sensor a) The disconnection of sensor is detected for 5 seconds continuously within 20 seconds after the power turns ON.
Page 63 '22 • HM-T-419 (4) Water circuit system control (4)-1 Water circuit system control at [Operation to top up] 1) Operation to top up If the hot water amount detected by the cylinder temperature sensor is less than the set amount in the cylinder, the heat pump water heater starts operation to top up the hot water and storage it.
Page 64 '22 • HM-T-419 [Set temperature ＞Actual hot water temperature Initial state Water pump speed : Initial set speed Flow regulator: Initial set value Hot water outlet temperature ≒ Set temperature? Water pump speed decreases Hot water outlet temperature ≒ Set temperature? Water pump speed ＝Min?
Page 65 Operation mode becomes [Stop] mode. ③ Contents of control The water circuit is changed to circulate the water as shown in the following figure. ・ In case of unvented cylinder CWFV3 CWFV5 ESA30EH2-25 Open Form C Water is circulating Feed water...
Page 66 '22 • HM-T-419 (5) Limited unit control Limited unit control is enabled when the following conditions are satisfied. (a) When the master unit 7-segment display shows 1 for P12 (b) When the demand control is enabled with the external input (CNS2) or the remote control (c) The version of main ROM is 1.812 or later.
Page 67 '22 • HM-T-419 (7) External output of hot water amount * This is operable with the heat source unit software version 1.802 or later. * This can be set with the external output function No. “15”. In case of 15: Hot water amount output ・ I f it is the master unit, it controls as shown below depending on the setting values of P94 and P95 on the 7-segment display.
Page 68 '22 • HM-T-419 (8) Checking of operation of water-side solenoid valves CWFV3, 5 1) Stop the entire system of heat source water heater. (Reference) The entire system stops if System off is selected from the Service & Maintenance menu on the remote control or if the shorting pin for the external input CNS1 on the heat source water heater PCB is pulled out.
Page 69 '22 • HM-T-419 (9) Return hot water control CWFV2(3-way valve) and the temperature sensor can be used to control the position of the return hot water. By controlling the return hot water position, high-temperature water entry into the unit is prevented, abnormal stop is prevented and efficient operation is realized.
Page 70 “COMMISSION DELEGATED REGULATION (EU) No. 813/2013 of 2 August 2013” Implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for space heaters and combination heaters (c) Target Model Heat Pump Combination Heater ESA30EH2-25 Hot Water Storage Tank GX-1000-RB...
Page 71 5 The Square, Stockley Park, Uxbridge, Middlesex, UB11 1ET, UK Tel : +44-333-207-4072 Fax : +44-333-207-4089 http://www.mhiae.com MHIAE SERVICES B.V. (Wholly-owned subsidiary of MITSUBISHI HEAVY INDUSTRIES AIR-CONDITIONING EUROPE,LTD.) Herikerbergweg 238,Luna ArenA,1101 CM Amsterdam,Netherlands Tel : +31-20-406-4535 http://www.mhiaeservices.com/ 2) Heating energy efficiency...
Page 72 The appliance is with an outdoor unit and indoor unit. The outdoor unit is an air/water heat pumps including electrical- ly driven compressor. The indoor unit is a domestic hot water storage tank and floor heating panel. 2) Technical data of water heater Model name ESA30EH2-25 Rated voltage (V) 3N~, 380 / 400 / 415 Rated frequency (Hz)
Page 73 The apparatus is a DC brushless pump integrated in the heat pump water heater. The function of this apparatusis circulating water inside the water heater. 2) Specification of the water heater and the water pump Specification of the water heater Model name ESA30EH2-25 Rated voltage (V) 3 Phase, 380 / 400 / 415 Rated heating capacity (kW) Refrigerant...
Page 74 '22 • HM-T-419...
Page 75 '22 • HM-T-419 PCM012D026 3. APPLICATION DATA 3.1 Installation work for air to water heat pump water heater Heat pump unit: ESA30E/ E S A 3 0 E H s e r i e s H W storage unit: Unvented ◎...
Page 76 '22 • HM-T-419 WARNING ●The D-type grounding work shall be done properly. Do not connect the grounding wire to gas pipe, water pipe, lightning rod, earth wire of telephone. Improper grounding may cause malfunction, electric shocks at el In case of connecting to gas pipe, if gas leak occurs, there is ●During installation work or relocation work of the unit, do not mix the air other than CO into the refrigerant circui t.
Page 77 '22 • HM-T-419 CAUTION ● ls are handled. nance work. tion place. ● When installing the unit on a roof or a high place, for preventing from a fall, install permanent ladders and handrails at the passage, and install fences and handrails around the unit. If not, it might cause injury due to falling from the installation place.
Page 78 '22 • HM-T-419 (1) Before installation (Check the model, electrical speciﬁcations, piping, necessary option parts and etc, and install properly.) Caution ● Read this manual before starting installation work and proceed installation work properly according to this manual. ● For the piping work, option parts are required, please refer to the catalog and etc for this unit. ●...
Page 79 '22 • HM-T-419 1-3 Speciﬁcations of unvented hot water storage cylinder for connecting to ESA30EH2 Please arrange and procure a new unvented cylinder with followi * If connecting ESA30EH2 to the existing cylinder, the hot water temperature and amount in the cylinder cannot be detected correctly. In such case, please consult with our distributor.
Page 80 '22 • HM-T-419 ● Insulation Insulation must be required in order to keep hot water temperature stored in the cylinder. • Shell Material: Glass wool Density: 16kg/m Thickness: 50mm or more • End plate Material: Glass wool Density: 24kg/m Thickness: 50mm or more ●...
Page 81 '22 • HM-T-419 (2) INSTALLATION LOCATION (Obtain approval from the customer when selecting the installation area) 2-1 Selecting the installation location ○ Where air is not trapped ○ Where the installation place is solid to install the unit f ○ air ports ○...
Page 82 '22 • HM-T-419 2) In case that multiple heat pump units are installed ★ shows the front side of the unit ① Installation example for 3 units in a row Installation example Dimension Wall height≦H3 suction ≧L2 ≧L5 ≧L6 ≧L4 suction suction suction...
Page 83 '22 • HM-T-419 (3) Carrying in and installation of unit CAUTION gravity center position. 3-1 Carrying in ning a unit to the installation point ●In slinging a heat pump unit, use two canvas belts with plates, cloth pads or other protections applied to the unit to prevent from damage Please note a) Please do not fail to put belts through the rectangular holes of units anchor legs.
Page 84 '22 • HM-T-419 (4) Water piping work 4-1 General description shows the flow direction of water Heat pump unit 4-1.1 Outline of water piping ⑧ ② ① ③ ④ ⑪ ⑤ ⑨ ⑥ ⑨ ⑤ ④ ③ ① ② ⑦ ⑩...
Page 85 '22 • HM-T-419 (iv) Right-angled expansion piping is prohibited. (Return piping from tank) Be sure not to install such up and down piping that air is likely to accumulate. (such as right-angled expansion piping) Right-angled expansion piping is prohibited. Hot water storage unit Heat pump unit Built-in pump Water piping...
Page 86 '22 • HM-T-419 4-2 Water piping work ● When doing piping work between the heat pump unit and the unvented cylinder, be sure not to interfere the service space of the heat pump unit . Regarding the service space, please refer to chapter 2. 4-2.1 Limitation of piping length between the heat pump unit and the unvented cylinder Be sure to install the heat pump unit and the unvented cylinder in the shortest piping length from the view point of saving energy.
Page 87 '22 • HM-T-419 4-3 System diagram The system diagram for using 2, 6 and 8 sets of 500liter cylinders are shown as follows. Please install the unvented cylinder system by referring the following notabilia for system structures. The number of cylinder which is connectable to one heat pump unit ESA30EH2 series should be 2, 6 or 8. If you want to select other combination than these, please consult with our distributor.
Page 88 '22 • HM-T-419 Installation example (i) In case that 2 sets of cylinders are installed Air purge valve Pressure relief valve Air purge valve 3-way valve Hot water stop valve* Form B direction Hot water supply port From heat pump unit (Hot water outlet side) * In case that one heat pump unit is connected, this valve is not necessary.
Page 89 '22 • HM-T-419 (5) Insulation work and water prooﬁng work 5-1 Insulation work ● Temperature of cylinder and piping increase up to 90°C at the maximum. Be sure to insulate them from a view point of preventing from burns and keeping hot. tions.
Page 90 '22 • HM-T-419 (6) Electrical wiring work for the heat pump unit Electrical installation work must be performed by an electrical the country. Electrical installation work must be executed according to the technical standards and other regulations applicable to electrical installations in the country.
Page 91 '22 • HM-T-419 6-1 Wiring system diagram 6-1 Wiring system diagram...
Page 92 '22 • HM-T-419 CAUTION If the earth leakage breaker is exclusively for ground fault protection, the installation of circuit breaker for cabling shall be required separ - ately. a) Be sure to lead power cables, grounding wire, signal wire and remote control wire to the terminal block. Each wiring shall be connected to the terminal block securely.
Page 93 200V±10% of power source voltage between the terminal 3 and 4 on the TB2 by *ESA30EH2-25/C has no “+” and “-” terminals. measuring with a multi tester.
Page 94 '22 • HM-T-419 6-3 Connecting method of power cable (a) Method for leading out cables ● Cables can be led out through the front, right, left panel and bottom plate. φ 50 or elongate hole 40x80) cover for penetration of cables with nipper. ●...
Page 95 '22 • HM-T-419 (7) Electrical wiring work for the unvented cylinder ● temperature which water may freeze. Please prepare the exclusive power source for the anti-freeze pipe heater. * As a guide, the Anti-freeze pipe heater output is 10W per 1m of piping length. (In case of enough insulation thickness) ●...
Page 96 '22 • HM-T-419 (i) In case that 2 sets of cylinders are installed 500L x 2 Hot water supply Hot water flow at operation to top up Form B At the welded point of the top end plate Hot water Cylinder 2 Cylinder 1 Tht-2...
Page 97 '22 • HM-T-419 7-2 Wire connecting method Please note ◎ Do not turn on the power until the electrical work is completed. Be sure to turn off the power when servicing. ◎ U se the specified wires, connect them securely and clamp them in order for any external force not to be applied to the terminal. (locally procured) ◎ ...
Page 98 '22 • HM-T-419 Terminal block Terminal block for temperature sensor Tht-1to -9 for solenoid valve CWFV (Locally procured) (Locally procured) MTH-Q4E MTH-Q5E MTH-Q3E Insulating treatment shall be done Attached to the option parts on other terminals MTH-Q1E or MTH-Q2E Attached to the option parts MTH-Q6E or MTH-Q7E 1-Phase 200V 50Hz Heat pump unit...
Page 99 '22 • HM-T-419 Connecting position of connector MTH-Q1E or MTH-Q6E MTH-Q2E MTH-Q7E Relay harness 3way valve for anti-freezing MTH-Q4E (Option part) No use No use Hot water stop valve MTH-Q5E (Option part) Terminal block for tank side (Locally provided) 7-4 Control setting when unvented cylinder is connected. Please implement the control setting according to the instr ・...
Page 100 '22 • HM-T-419 7-5 Anti-freezing water circuit for unvented cylinder In case that the water in the pipe may be frozen due to decreasing the water temp below 0ºC in winter season during the long term stop or anomaly stop of heat pump unit, the water pump is forcibly operated in order to prevent water in the pipe from freezing. ②...
Page 101 '22 • HM-T-419 7-6 Defrost operation for unvented cylinder 7-6 Defrost operation for unvented cylinder In order to recover from dropping the heating capacity for producing hot water due to the frost on the heat exchanger of heat pump unit, In order to recover from dropping the heating capacity for producing hot water due to the frost on the heat exchanger of heat pump unit, defrost operation is done periodically.
Page 102 '22 • HM-T-419 (8) Control setting 8.1 Unit address setting This control system controls the communication among the controls consisted of multiple heat pump units and remote controls by the micro-computer built in the each control. After setting address and the communication among the multiple heat pump units is established, check the communica- tion method by 7-segement display of the heat pump unit.
Page 103 '22 • HM-T-419 8.3 Check DIP switch setting Check the settings of following DIP switches on the control PCB. Especially for SW3-3, be sure to set after checking the type of HW storage unit (Unvented or Open) *1 In EU counties, please kept SW3-3 "OFF", because only the unvented cylinder is supplied in the market. Input item Input item DIP switch (OFF/ON, Open/Short) Check item DIP switch (OFF/ON, Open/Short) Check item " ★ " shows factory default "...
Page 104 '22 • HM-T-419 8.4 Software switch setting If No. of water temperature sensors for unvented Each control and setting can be set by the software switch. cylinder are less than 8 pieces, this setting is Please set the setting according to the following procedure mentioned in required.
Page 105 '22 • HM-T-419 4 points unit relay Control PCB on the heat pump unit Coil resistance Example of use 720Ω or more Terminal arrangement Note: (TOP VIEW) If external input/output is used, please use relay − − − − ＋＋...
Page 106 '22 • HM-T-419 (9) Commissioning and handover 9.1 Before test run (a) Be sure to check whether 1MΩ or bigger of insulation resistance can be detected by measuring with 500V meggar tester between power terminal and grounding. (b) Before turning the power on, if the resistance between A and B of signal wiring terminal is 100Ω or lower, the power cables may be connected to the signal wiring terminal.
Page 107 '22 • HM-T-419 (10) Inspection report 10.1 Project information Project name Checker Date Heat pump unit Hot water storage tank Unit No. Remark Model name Serial No. Model name Serial No. ① ② ③ 10.2 Check list for installation ○ : OK △...
Page 108 '22 • HM-T-419 10.3 Check list for commissioning ○ : OK △ : shall be revised ― : No item Checked result Check item Standard Remark ① ② ③ Setting of SW3-3 See 8-(3) Is SW3-3 on the control PCB of heat pump unit set OFF? (Factory default) for details (ON: Open tank)
Page 109 '22 • HM-T-419 Operation data of the heat pump unit (Should attach Mente PC data) [Date of data acquisition : Measured item Measured result ① ② ③ Item Unit ℃ Feed water inlet temperature ℃ Water circuit Hot water outlet temperature ℃...
Page 110 '22 • HM-T-419 External input harness installation manual This harness is used to control the operation of the CO water heater from an external control panel. (A separate field supply contact relay is required on site.) Warning Installation should be performed by a professional contractor. The electrical wiring work shall be done by a qualified electrical installer, and the exclusive circuit shall be used.
Page 111 '22 • HM-T-419 External output harness installation manual This harness is used for carrying out the removal of the operation and abnormal signal from the CO heat pump water heater. (A separate field supply 4 points unit relay is required on site.) WARNING ●...
Page 112 '22 • HM-T-419 * This can be set with the external output function No. “15”. In case of 15: Hot water amount output ・ I f it is the master unit, it controls as shown below depending on the setting values of P94 and P95 on the 7-segment display. ・ ...
Page 113 S ince a cylinder that cannot maintain the thermal boundary layer may not be able to follow the hot water supply load, it is recommended to add a cylinder that can produce the thermal boundary layer. T he additional cylinder will allow adapting to the hot water supply load when temperatures in the existing cylinder drop. Regarding the position of sensors, other than 100%, which are installed on the additional cylinder, please consult us. Tht-1 Tht-4 60% Tht-2 Tht-5 Tht-3 Tht-6 100% Existing cylinder cylinder Clean water and return When using an additional 500liter cylinder as shown above, plase set target volume 100% (RC-Q1EH2) and 7-segment P78 as "90"(ESA30EH2-25) ,then the heat pump water heater starts operation after hot water volume beomes 0%.It enables continuous operation for more than 30min to prevent frequent ON/OFF operation. (For 10% ⇔ 100% operation, set target volume 100% and 7-segment P78 as "70")
Page 114 '22 • HM-T-419...
Page 115 '22 • HM-T-419 (14) Recirculation hot water supply system 14.1 Features The CO heat pump water heater allows converting a set of one way system composed of heat pump water heater and hot water cylinders, without change and immediately, to a recirculation system by adding up a mixing valve and a recirculation pump at site. Its 4,000 L cylinder volume composed of eight 500 L cylinders of which 2 to 5 cylinders (depending on the hot water temperature setting and the recirculation circuit specification) are used as the recirculation load. Since the gross volume of these cylinders is 4,000 L, remaining 3 to 6 cylinders can be used as the hot water supply load. This system, in this way, is used where recirculation load and hot water supply load are present in mixture *1. With this system, risk of the short-supply of hot water is small even if the hot water temperature is not increased remarkably so far as the recirculation load in use and the hot water supply load are balanced well. When the water supply side of mixing valve is interrupted accidentally, hot water retained in the cylinder flows directly into the recirculation circuit. From the viewpoint of safety as well, it is recommended to use the system by lowering the hot water temperature *2.
Page 116 '22 • HM-T-419 14.2 Recirculation hot water supply system diagram and component list 1) System diagram...
Page 117 '22 • HM-T-419 2) Component list Part name Model General description Recommended: JRG3400N-946N (32A, temperature range 45 – 65°C, MAX temperature 90°C) ＊ Check valves is needed at the inlet of the cold water, hot water ① Mixing valve (Locally procured) — and recirculation return of the valve. If you use JRG3400N, check valves are attached at the cold water inlet and hot water inlet. Please select products for hot water recirculation Use inlet water pressur is more than 0.4MPa, ＊...
Page 118 '22 • HM-T-419 14.3 Example of calculation for recirculation load ● Guidelines of the heat loss from piping and the recirculation hot water flow volume on recirculation system Calculate the heat loss from piping and the recirculation flow volume as follows. Heat loss from piping (W) = H eat loss per unit length of recirculation feed pipe diameter (see table below) × recirculation feed pipe length × (Recircu- lation feed hot water temperature － Temperature around pipe) ＋ Heat loss per unit length of recirculation return pipe diameter (see table below) × recirculation feed pipe length × (recirculation return hot water temperature － Temperature around piping) Recirculation water flow volume (L/min) = Heat loss from pipe (W)/(4.18 ×...
Page 119 '22 • HM-T-419 [Example 2] If the hot water outlet temperature is changed, the number of cylinders as the recirculation load also changes. For the calculation at 60 ℃ of hot water outlet temperature, refer to [Example 1]. ℃ Hot water outlet temperature Recirculation temperature setting ℃ Recirculation return temperature ℃ Feed pipe length Return pipe length ℃ Ambient temperature Heat loss from recirculation circuit W 1365 1365 1365 1365 1365 1365 Recirculation hot water flow volume L/min Operation time 1.18E ＋ 08 1.18E ＋ 08 1.18E ＋...
Page 120 '22 • HM-T-419 (15) Snow prevention hood Snow hood When installing the equipment in a snowy district, it is necessary to produce a snow hood at site, in order to protect the heat source unit from accumulating snow. 1) Outline of snow hood ③ ① ② Installation of snow hood ① Suction side (for front, rear) x 2 Screw hole to install on main unit: 9 places...
Page 121 '22 • HM-T-419 ② Suction side (for right, left ） x 2 Screw hole to install on main unit: 9 places ③ Outlet side x 1 Screw to install on main unit: 14 places...
Page 122 '22 • HM-T-419 2) Installation (1) Remove the fin guards from the front and rear of heat source unit. (2) I nstall the snow hood sections ① , ② and ③ on the heat source unit. Provide following screws to install them. These screws are not included in the accessory of the equipment. ③ Screw to install on main unit Tapping screw (5 x 10) 14 pcs.
Page 123 '22 • HM-T-419 3.2 Installation work for remote control Installation manual of the remote control for heat pump water heater Installation manual of the remote control for heat pump water heater PJZ012D132 This installation manual describes the installation methods and precautions related to the remote control. Use this manual together with the user’s manuals for the heat pump unit and other option equipment.
Page 124 '22 • HM-T-419 2. Accessories & parts prepared at site Accessories Remote control main unit, wood screw ( 3.5 x 16) 2 pcs., User's Manual, Installation Manual (in CD-R) Parts prepared on site The max size for the wires used in the R/C case is Item name Q'ty Remark...
Page 125 '22 • HM-T-419 4. Installation and wiring work Dimensions (View from front side) PCB side (View from rear side) Fixing hole Fixing hole Terminal Sensor 1 To remove the upper case from the bottom case of R/C • Insert the tip of a ﬂat head screwdriver or the like in the recess at the lower part of R/C and twist it lightly to remove Take care to protect the removed upper case from moisture or dust 2 Connect the wires from X and Y terminals of R/C to X and Y terminals of...
Page 126 '22 • HM-T-419 R/C cable 4. Installation and wiring work (Continue) 5 When ﬁxing the bottom case diagonally at 2 places, cut out the thin wall part of the case. 6 Fix wires such that they will run around the terminal screws on the upper case of R/C. Wiring hole on 7 Install the upper case with care not to pinch wires of R/C.
Page 127 '22 • HM-T-419 5. Main/Sub setting when more than one remote control is used 5. Main/Sub setting when more than one remote control is used Up to two units of R/C can be used at the maximum for one heat pump unit or one group. Up to two units of R/C can be used at the maximum for one heat pump unit or one group.
Page 128 '22 • HM-T-419 6. Power source and initial setting Set the main and sub R/C according to the display at the power on (1) If the main and sub are not set yet, [Select Main/sub set input] screen is displayed. (Screen ② ) When tapping the [Main] or [Sub] button, the initial setting starts.
Page 129 '22 • HM-T-419 7. Installation settings and test run [TOP screen] ⇒ [Menu] ⇒ [Installation setting] ① TOP screen ② Menu screen (1) ② Menu screen (2) ③ Service password input ④ Installation settings ⑤ Installation date Service password is "9999". Set with [ ] [ ] buttons.
Page 130 '22 • HM-T-419 7. Installation settings and test run (Continue) Test run procedure * When operating the unit initially, [Water pump test run] and [Primary setting of operation] is required. (1) Please prepare for the test run according to instruction described on the installation manual of the heat pump unit. (2) Tap the Start button on the [ ⑩...
Page 131 '22 • HM-T-419 8. User environment (Simpliﬁed setting for operation pattern) This heat pump unit is operated to top up hot water according to the target hot water amount set at each time zone. By selecting the operation pattern for the typical business type which is similar to your actual usage pattern of hot water, you can set the operation pattern easily.
Page 132 '22 • HM-T-419 9. R/C function settings [TOP screen] ⇒ [Menu] ⇒ [R/C function settings] ① TOP screen ② Menu screen (1) ② Menu screen (2) ③ Service password input ④ R/C setting menu ⑤ Main/sub of R/C The service password is "9999". (Unable to change) ⑥...
Page 133 '22 • HM-T-419 10. Service & maintenance 10. Service & maintenance [TOP screen] ⇒ [Menu] ⇒ [Service & Maintenance] [TOP screen] ⇒ [Menu] ⇒ [Service & Maintenance] ① TOP screen ① TOP screen ② Menu screen (1) ② Menu screen (1) ②...
Page 134 '22 • HM-T-419 10. Service & maintenance (Continue) ㉑ Delete history acknowledge ⑨ Save HP Unit setting Information The remote control can save the cumulative operation hours of the components for water and refrigerant circuit memorized in the heat pump unit as backup.
Page 135 '22 • HM-T-419 3.3 Setting and operation modes for unvented cylinder and configuration of master-slave units (1) Introduction With the sealed master-slave connection, a heat pump water heater is set as the master unit for a unvented type hot water cylinder, and up to 3 heat pump water heaters are connected as slave units to the master unit.
Page 136 '22 • HM-T-419 (3) Component list Part name Model General description ① Heat pump water heater ESA30EH2-25 For outdoor air temperature -25°C Remote control for heat pump water ② RC-Q1EH2 For setting hot water amount and setting hot water temperature.
Page 137 '22 • HM-T-419 (4) Address setting SW1, 2 Set the heat pump water heater No. by the combination of SW4-7, SW4-8 SW settings. * Rotary switches SW1 and SW2 only are not used for the address No. setting. Address setting method  A remote control is necessary for the master unit.
Page 138 '22 • HM-T-419 Example of address setting for multiple unit connection Hot water cylinder ① Cylinder Water pipe Water pipe Water pipe Water pipe Cylinder temperature (Water supply, (Water supply, (Water supply, (Water supply, temperature Master-slave sensor wire hot water outlet) hot water outlet) hot water outlet) hot water outlet)
Page 139 '22 • HM-T-419 3.4 Design guidelines for CO heat pump water heater in top up operation mode for heating applications (1) Introduction Example and feasibility study of CO heat pump water heater for low temperature or unvented floor heating calculations based on the following conditions: •...
Page 140 '22 • HM-T-419 (3) Water piping connection The distance between heat pump water heater and hot water storage unit should be as shorter as possible from a view point of energy saving. Please decide the pipe size and length in order for pipe resistance to be lower than allowable external head (at the maximun flow volume) of heat pump water heater as shown below.
Page 141 '22 • HM-T-419 (5) Operation control of CO heat pump water heater (Detection of reach and un-reach temperature) For continuous loads, such as for under floor heating, it is necessary to provide a specific control, which starts operation when No. 1 sensor attached to the cylinder detects the state of un-reached temperature, and stops operation when No. 2 sensor detects the state of reached temperature.
Page 142 '22 • HM-T-419 (b) Quantity of heat to be retained always in the cylinder It is always necessary for the cylinder to retain enough heat that can cover the following energy requirements: (i) Quantity of heat energy that can be supplied to the load for 10 minutes, till the discharge hot water temperature stabilizes after start up operation of heat pump water heater.
Page 143 '22 • HM-T-419 3.5 External input and output (1) External input terminal specifications Usage ( ★ Factory default) Name Remarks When CNS1 is opened, it makes all All system stop input ( ★ Short) CNS1 system stopped. Anti-freezing water operation is also canceled. When CNS2 is opened, demand Demand input ( ★...
Page 144 '22 • HM-T-419 (2) Control of CO heat pump water heater operation by external input and output (a) Outline ・ This chapter explains how to control Start ⇔ Stop operation of CO heat pump water heater from the user’s control panel. When controlling the unit via the control panel and external input, however, the temperature detection in the cylinder using the temperature sensors can be disabled.
Page 145 '22 • HM-T-419 Table: External inputs/outputs Name Purpose (Factory default) Specification Caution System full-stop input Stopped when open. CNS1(Green) (Factory default: Shorted) Anti-freezing operation is also cancelled. Non-voltage External Derate input Input when open. CNS2(Red) contact input (Factory default: Shorted) Set demand ratio with SW4-5, 4-6.
Page 146 '22 • HM-T-419 (d) Other setting (Mandatory) • Turn the DIP switch : SW5-6 to ON • Set 7-segment: P01 at “0”. Since the cylinder temperature information to the hot water supply is deprived, oPE-32 is displayed always on the PCB of hot water supply unit. This is normal. •...
Page 147 '22 • HM-T-419 3.6 Guideline for indoor installation of CO heat pump water heater heat pump water heater uses a natural refrigerant, CO (carbon dioxide). Although CO refrigerant itself is not toxic, a higher concentration of CO refrigerant causes various adverse influences on human body if it is inhaled. Also to consider, the outdoor unit produces condensation water that needs to be drained properly.
Page 148 '22 • HM-T-419 ② Occupied space An occupied space is a space in a building which is bounded by walls, floors and ceilings and which is occupied by persons for a significant period. Where the CO heat pump water heater is in or the piping passes through an occupied space having a volume of such size that the total charge exceeds the allowable charge specified in EN 378-1:2016, C.3, then the alternative provisions in EN 378-3:2016 Clause 6 may be applied to ensure safety.
Page 149 '22 • HM-T-419 (2) Indoor ventilation capability and safety Since the unit is a CO heat pump water heater, cold air is released from the top fan when hot water is produced. If there is neither other heat source nor room ventilation, dewing or freezing could occur in the room, which could cause problems to other equipment.
Page 150 '22 • HM-T-419 (3) Drain water disposal Drain water is released from the piping of CO heat pump water heater, accumulator vessel or other. • Dewing water from the outdoor unit’s heat exchanger and piping in summer • In winter, drain water is released from frozen water during the defrost operation in addition to the above. *The melting water and drain water are released from the drain outlet on the base.
Page 151 '22 • HM-T-419 4. SERVICING 4.1 General description of servicing (1) Test run (a) Kinds of test run (Definition of terms) Operation mode after Terms Starting method Ending method Complement test run 1. Water pump test run At Run or Pause, start test run with one of following procedures <Action at water pump...
Page 152 '22 • HM-T-419 (b) Test run procedure a. After completion of installation work, check water can be supplied to the hot water supply system and turn the power ON. After setting the [Date] and the [Time] , the following TOP screen (Screen 1-1) is displayed on the R/C. * At this time, The mode of operation is [Pause] Caution 1 After servicing , according to this test run procedure, implement [Water pump test run] and [Primary setting of operation] as well.
Page 153 '22 • HM-T-419 d. After the end of water pump test run, switch OFF the SW5-2 on the PCB of the heat pump water heater and stop operation of water pump test run. Screen 3-1 If stopping this operation with R/C, push Run/Pause switch at the TOP screen (Screen 3-1). e.
Page 154 '22 • HM-T-419 g. After completion of [Primary setting of operation], make setting of the operation pattern with R/C according to the hot water supply load to meet customer’s requirement and start operation with Run/Pause switch (Screen 3-1). Screen 6-1 Caution 5 If the hot water amount in the cylinder is more than the target hot water amount, the unit does not start operation.
Page 155 '22 • HM-T-419...
Page 156 '22 • HM-T-419 (2) Method to purge CO refrigerant (a) Turn the power ON at the state that SW5-7 on the PCB of the heat pump water heater is switched ON. With this procedure, operation is prohibited and EEVG1, EEVH1 and EEVH2 become fully opened. (b) Turn the power OFF for safety.
Page 157 '22 • HM-T-419 [Caution] The cautionary note for evacuation is same as that for R410A. [Evacuation] Implement evacuation sufficiently for removing moisture in the refrigeration circuit. * If the content percentage of moisture is high, it may cause clogging of EEVs and/or capillary tubes * Turn the power ON after switching ON the SW5-7 and open EEVs fully.
Page 158 '22 • HM-T-419 4.2 Error code list Remote LED on heat pump water heater 7-segment control Contents of inspection display Green Error code Power line anomaly No display Keep flashing Stay off Normal No display Keep flashing Stay off Normal Communication error between remote control and heat pump water heater Keep flashing Stay off...
Page 159 '22 • HM-T-419 Remote LED on heat source water heater 7-segment control Content of inspection display Error code Green Keep ﬂ ashing 1-time ﬂ ash E60-1 Rotor position detection failure (CM1) 1-time flash E61-1 Communications error between the master unit and slave unit 1 Keep flashing 2-time flash E61-2...
Page 160 '22 • HM-T-419 Maintenance code Maintenance code is the signal to prompt service and maintenance, not to show anomaly. 7-segment Remote control display display Item Remark Compressor operation hours <In case that SW6-8 is OFF> When the cumulative operation hours of compressor has elapsed 5,000hr since the last maintenance, and it is between 4,900hr and 5,100hr.
Page 161 '22 • HM-T-419 4.3 Troubleshooting Green Content Error code Power source anomaly No error code Remote control: Heat pump Keep (Power source to remote control) Stay off water heater flashing 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is there no loose connection of Correct it.
Page 162 '22 • HM-T-419 Green No display Content Error code No display Remote control: on the remote control Heat pump Keep Stay off water heater flashing 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure (In case of no display on the remote control) No display on the remote control after the power is...
Page 163 '22 • HM-T-419 Green Communication error between Error code Content Remote control: remote control and heat pump water heater Heat pump Keep Stay off No display 7-segment display: water heater flashing 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Malfunction by noise Does it return correctly by resetting power?
Page 164 '22 • HM-T-419 Green Excessive No. of heat pump Error code Content Remote control: water heaters connected to one remote control Heat pump Keep Stay off water heater flashing 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Are more than 17 sets of heat Remote control anomaly pump water heaters connected...
Page 165 '22 • HM-T-419 Green Duplicated address No. of heat pump water heater Error code Content Remote control: Address setting error of heat pump water heater Heat pump Keep 1- time 7-segment display: water heater flashing flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure...
Page 166 '22 • HM-T-419 Green Error code Content Open phase of power line Remote control: Heat pump Keep 1-time 7-segment display: water heater flashing flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure • Check the operation status and record it. Save the Mente PC data of 30 minutes •...
Page 167 '22 • HM-T-419 Green Error code Content Discharge pipe Remote control: Heat pump Keep 1-time temperature anomaly 7-segment display: water heater flashing flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Is there any Specify the leak point and leak of refrigerant? rectify it.
Page 168 '22 • HM-T-419 Green Error code Content Outdoor heat exchanger sensor (Tho-R1, 2, 3, 4) anomaly Remote control: Heat pump Keep Gas cooler temperature sensor (Tho-G1, 3, Tho-W1, 2) anomaly E37-1 to -9 7-segment display: water heater flashing *1 E37-1 to -4: Tho-R1 to -R4, E37-5, -6: Tho-W1, -W2, E37-7, -9: Tho-G1, -G3 *2 According to the kinds of sensors, from 1 to 6-time flash or keep flashing 5.
Page 169 '22 • HM-T-419 Green Outdoor air temperature Error code Content Remote control: sensor (Tho-A) anomaly Heat pump Keep 1-time 7-segment display: water heater flashing flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure • Check the operation status and record it. Save the data 30 minutes before stopping •...
Page 170 '22 • HM-T-419 Green Error code Content Discharge pipe temperature sensor (Tho-D1) anomaly Remote control: Heat pump Keep Intermediate receiver inlet temperature sensor (Tho-M1) anomaly E39-1, 3 7-segment display: water heater flashing *1 E39-1: Tho-D1, E39-3: Tho-M1 *2 E39-1: 1-time flash, E39-3: 3-time flash 5.
Page 171 '22 • HM-T-419 Green Error code Content High pressure anomaly Remote control: Heat pump Keep 1-time (63H1-1 activated) 7-segment display: water heater flashing flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure • i t a t a t Save the data 30 minutes and record it.
Page 172 '22 • HM-T-419 Green Error code Content Power transistor overheat E41 (E51) Remote control: Heat pump Keep 1-time E41 (E51) -1 7-segment display: water heater flashing flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure • Check the operation status and record it.
Page 173 '22 • HM-T-419 Green Content Error code Current cut Remote control: Heat pump Keep 1-time water heater 7-segment display: flashing flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure • i t a t a t and record it. Save the Mente PC data of 30 minutes •...
Page 174 '22 • HM-T-419 Communication error Green Error code Content between inverter PCB and control PCB Remote control: Heat pump Keep 1-time High pressure anomaly (63H1-1 activated) E45-1 7-segment display: water heater flashing flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure •...
Page 175 '22 • HM-T-419 Communication error Green Error code Content between inverter PCB and control PCB Remote control: Heat pump Keep 1-time High pressure anomaly (63H1-1 activated) E45-1 7-segment display: water heater flashing flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure From previous page...
Page 176 '22 • HM-T-419 Green Error code Content Heat pump water heater Remote control: No display *1 Keeps Heat pump 1, 2 DC fan motor anomaly (1/2) 7-segment display: E48-1, 2 ﬂashing water heater times *1 E48-1: FMO1/ 1 time ﬂashing, E48-2: FMO2/ 2 time ﬂashing 1.
Page 177 '22 • HM-T-419 Green Error code Content Heat pump water heater Remote control: No display *1 Remote control: No display *1 Keeps Heat pump 1, 2 DC fan motor anomaly (2/2) 7-segment display: E48-1, 2 7-segment display: E48-1, 2 ﬂashing water heater times *1 E48-1: FMO1/ 1 time ﬂashing, E48-2: FMO2/ 2 time ﬂashing...
Page 178 '22 • HM-T-419 Green Error code Content Low pressure anomaly Remote control: Heat pump Keep 1-time E49-1 7-segment display: water heater flashing flash 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure Before starting operation, is the power The refrigerant may to the heat pump water heater be accumulated in the turned ON?
Page 179 '22 • HM-T-419 Green Error code Content Anomaly of hot water temperature sensor for Remote control: Heat pump Keep unvented cylinder (Tht-1 to -9) water heater flashing 7-segment display: E52-1 to -9 * 1 E52-1 to -9: Tht-1 to -9, * 2 E52-1 to -6: 1 to 6-time flash, E52-7 to -9: Keep flashing, 5.
Page 180 '22 • HM-T-419 Green Content Error code Suction pipe temperature sensor (Tho-S1) anomaly Remote control: Heat pump Keep Injection inlet temperature sensor (Tho-INJ1) anomaly water heater flashing E53-1, -3 7-segment display: * 1 E53-1: Tho-S1, E53-3: Tho-INJ1 * 2 E53-1: 1-time flash , E53-3: 3-time flash 5.
Page 181 '22 • HM-T-419 Green Error code Content High pressure/Intermediate pressure/ Remote control: Heat pump Keep Low pressure sensor anomaly (PSH/PSM/PSL) water heater flashing 7-segment display: E54-1, -2, -3 * 1 E54-1: Low pressure sensor, E54-2: High pressure sensor. E54-3: Intermediate pressure sensor * 2 E54-1: 1-time flash, E54-2: 2-time flash.
Page 182 '22 • HM-T-419 Green Content Error code Under-dome temperature sensor (Tho-C1) anomaly Remote control: 1-time Heat pump Keep flash water heater flashing E55-1 7-segment display: 5. Troubleshooting 1. Applicable Model All models Diagnosis Countermeasure ・ C heck the operation status and record it. Save the Mente PC data of 30 ・ C heck it occurs soon minutes before stopping...
Page 183 '22 • HM-T-419 Green Error code Content Power transistor temperature sensor (Tho-P1) anomaly 1-time Remote control: Heat pump Keep flash E56-1 water heater flashing 7-segment display: 5. Troubleshooting 1. Applicable Model All models Diagnosis Countermeasure ・ C heck the operation status and record it.
Page 184 '22 • HM-T-419 Green Content Error code Compressor anomaly by loss of synchronism Remote control: 1-time Heat pump Keep flash water heater flashing E58-1 7-segment display: 5. Troubleshooting 1. Applicable Model All models Diagnosis Countermeasure ・ C heck the operation status and record it.
Page 185 '22 • HM-T-419 Green Content Error code Compressor startup failure Remote control: Heat pump Keep 1-time water heater flashing ﬂ ash 7-segment display: E59-1 5. Troubleshooting 1. Applicable Model All models Diagnosis Countermeasure ・ Check the operation Save the Mente PC data of 30 status and record it.
Page 186 '22 • HM-T-419 Green Content Error code Rotor position detection failure Remote control: 1-time Heat pump Keep flash water heater flashing E60-1 7-segment display: 5. Troubleshooting 1. Applicable Model All models Diagnosis Countermeasure ・ C heck the operation status and record it. Save the mente PC data of 30 minutes before stopping Correct it.
Page 187 '22 • HM-T-419 Green Error code Content Communications error between Remote control: E61 Keeps Heat pump the master unit and slave units 7-segment display: E61-1, 2, 3 *1 ﬂashing water heater *1 E61-1: Between master unit and slave unit 1 / 1-time ﬂash E61-2: Between master unit and slave unit 2 / 2-time ﬂash E61-3: Between master unit and slave unit 3 / 3-time ﬂash 5.
Page 188 '22 • HM-T-419 Green Error code Content Emergency stop Remote control: 1-time Heat pump Keep flash water heater flashing 7-segment display: 5. Troubleshooting 1. Applicable model All models Diagnosis Countermeasure ・ C heck the operation status and record it. ・ C heck it occurs soon Save the Mente PC data of 30 after power ON or during minutes before stopping...
Page 189 '22 • HM-T-419 Green Error code Content Water pump anomaly (1) Remote control: Heat pump Keep 1-time In case the motor does not rotate water heater flashing ﬂ ash 7-segment display: 5. Troubleshooting 1. Applicable Model All models Diagnosis Countermeasure When starting operation after the power ON, It is normal.
Page 190 '22 • HM-T-419 Measurement point Measurement value (Reference value) Tester + Tester - 393.6k Ω 24.9k Ω 559.6k Ω This value will change depending on the measurement device and ambient temperature, so please use this table for just a reference. Detial location of C48GND Right side with square mark means GND.
Page 191 '22 • HM-T-419 Water pump anomaly (2) Green Error code Content In case the motor rotates at anomously high speed Remote control: 1-time Heat pump Keep (Disable to control rotation speed or rotate at max speed) flash water heater flashing 7-segment display: 5.
Page 192 '22 • HM-T-419 Green Content Error code Communication error between CPU of control PCBs Remote control: 1-time Heat pump Keep flash water heater flashing 7-segment display: 5. Troubleshooting 1. Applicable Model All models Diagnosis Countermeasure Are the wiring harnesses and CPU may be malfunctioned cables passing above by the influence of wiring.
Page 193 '22 • HM-T-419 Green Error code Content It can operate but no hot water comes out (1) No display Remote control: Stay Heat pump Keep water heater flashing No display 7-segment display: 5. Troubleshooting 1. Applicable Model All models Diagnosis Countermeasure Insufficient capacity due to short circuit of air...
Page 194 '22 • HM-T-419 Green Content Error code It can operate but no hot water comes out (2) No display Remote control: Stay Heat pump Keep water heater flashing No display 7-segment display: 5. Troubleshooting 1. Applicable Model All models Diagnosis Countermeasure Check availability to operate heat pump water heater and the operating condition of heat pump water heater...
Page 195 '22 • HM-T-419 Green Error code Content It can operate but no hot water comes out (3) No display Remote control: Stay Heat pump Keep water heater flashing No display 7-segment display: 5. Troubleshooting 1. Applicable Model All models Diagnosis Countermeasure Check availability to operate heat pump water heater and the operating condition of heat pump water heater...
Page 196 '22 • HM-T-419 Green Content Error code Anomalous sound and vibration (1) No display Remote control: Stay Heat pump Keep water heater flashing No display 7-segment display: 5. Troubleshooting 1. Applicable Model All models Diagnosis Countermeasure Is the anomalous sound heard during operation or just Heat pump water heater is after stopping operation...
Page 197 '22 • HM-T-419 Green Error code Content Anomalous sound and vibration (2) No display Remote control: Stay Heat pump Keep water heater flashing No display 7-segment display: 5. Troubleshooting 1. Applicable Model All models Diagnosis Countermeasure Is the anomalous sound heard during operation or just Heat pump water heater is not a cause.
Page 198 '22 • HM-T-419 (1) Checking procedure of inverter PCB 1) Setup procedure of checker. a) Power OFF (Turn off the breaker). b) Remove the terminal cover of compressor and disconnect the wires (U, V, W) from compressor. c) Connect the wires U (Red) , V (White) and W (Black) of checker to the terminal of disconnected wires (U, V, W) from compressor respectively.
Page 199 '22 • HM-T-419 (3) Outdoor unit check points Check items with the *mark when the power is ON. Do not start the unit during checking for your safe. Noise ﬁlter check; Resistance check; There should be continuity. Resistance is measured 10-390Ω There should be no shorts between phases.
Page 200 '22 • HM-T-419...
Page 201 '22 • HM-T-419 4.5 Disassemble and reassemble method (1) Compressor replacement procedure (a) Purge CO refrigerant. Connect the charge hoses to the service valves and purge CO refrigerant. (It is available to purge CO in the air) Note 1) If purging refrigerant rapidly, the refrigerant may become frozen inside of service valve and cannot be purged.
Page 202 '22 • HM-T-419 3) Remove the power cables from compressor. Loosen 2 screws and remove the terminal cover. Screws Loosen 3 screws and disconnect the power cables. Note) Since the terminals are facing upward, it had better to use a stabilizing type screw- driver.
Page 203 '22 • HM-T-419 5) Remove temperature sensors. Remove 3 temperature sensors after removing insulations 1. Tho-INJ1 (Injection temperature sensor) 2. Tho-D1 (Discharge temperature sensor) 3. Tho-C1 (Under-dome temperature sensor) Tho-INJ1 Tho-C1 Tho-D1 6) Loosen 3 nuts of compressor mounting bolts. Compressor is fixed with 2 bolts in front and 1 bolt in the rear.
Page 204 '22 • HM-T-419 (c) Dismounting compressor 1) Disconnect pipes by cutting. ① Suction pipe Before disconnection work, be sure to check the residual pressure in the unit is 0MPa. (It is very dangerous to brazing pipe too hastily.) It is better to disconnect the pipe by cutting, because the pipe is thicker and the insertion depth of pipe is deeper.
Page 205 '22 • HM-T-419 3) Dismount the compressor. Incline the top of compressor to foreside and take it out obliquely upward. Note) When taking out compressor, be careful not to hit it against the suction pipe located at the rear lower left side of compressor.
Page 206 '22 • HM-T-419 (d) Mounting new compressor 1) Mounting new compressor Place the new compressor on to the mounting base without hitting the suction pipe located at the rear lower left side of compressor. 2) Tighten the nuts of compressor mounting bolts. Place the new compressor in right position on the mounting bolts and tighten the nuts.
Page 207 '22 • HM-T-419 3) Brazing ① Discharge pipe Be sure to do masking around the brazing place. (The places not only around discharge pipe but also around suction pipe and gas injection pipe) Note) Be careful to braze pipes without any gas leak later on, because the pipe is thicker and pipe insertion depth is deeper and then upper space is rather tight for brazing work.
Page 208 '22 • HM-T-419 (e) After mounting new compressor 1) Attach crank case heater and under-dome temperature sensor. Be sure to attach them before wrapping the insulation jacket around the compressor. 2) Wrap the insulation jacket around the compressor. Insert the insulation jacket from left side of compressor and wrap it around compressor.
Page 209 '22 • HM-T-419 4) Connect the power cable to the compressor. White White Blue Blue Front Front 5) Attach terminal cover and bundling the wires. Hook the back of terminal cover to the latch and tighten 2 screws. The unbound wires shall be put back the way they were.
Page 210 '22 • HM-T-419 (2) Inverter PCB replacement procedure (a) Replacement work of inverter PCB (on the third layer) 1) Loosen screws. The mounting board of the first layer (on the front) the second layer (on the back) can be removed like as opening door.
Page 211 '22 • HM-T-419 ② At the bottom of control box There are 2 screws at the bottom of the control box. ③ Open the mounting board of first and second layer. This mounting board supported at right edge as supporting point can be opened from left side. 2) Inverter PCB Following the process ①...
Page 212 '22 • HM-T-419 (3) Replacement procedure of power PCB and water pump PCB (a) Replacement work of power PCB (on the second layer) The second layer ① Loosen 4 screws. There are 4 screws at all corners of the first layer. ②...
Page 213 '22 • HM-T-419 ③ Disconnect the wires going to control PCB. Disconnect CNB1 connector (Green) and CNX1 connector (Yellow) on the control PCB. Disconnect CNB1 Disconnect CNX1 ④ Cut the tie-up band. Cut the tie-up band Cut the tie-up band ⑤...
Page 214 '22 • HM-T-419 ⑦ Disconnect the wire going to control PCB. Disconnect CN13V connector (White), CN15V connector (Yellow) and CN18V connector (Black) at the upper center part of control PCB. (Check the detailed position of connector with the wiring diagram or control PCB Disconnect drawing) ⑧...
Page 215 '22 • HM-T-419 (4) Dismounting water heat exchanger (a) Remove the insulation. The insulation will be reused. (b) Detach 4 screws(front side x 2 , back side x 2) from the base. ※ I t's no need to detach the insulation from the gas cooler.
Page 216 '22 • HM-T-419 (5) Replacement procedure of water heat exchanger (Gas cooler) (a) Removal of residual water in the water heat exchanger 1) Remove residual water in the water heat exchanger (from 2 ports). For air purge For air purge Turn the air purge valve and drain valve to open fully and discharge residual water.
Page 217 '22 • HM-T-419 3) Disconnect the water pipes and ThoG1 sensor ( at 2 positions). ① The positions to disconnect ② Disconnect the water pipes. Extract the quick fastener (female side)
Page 218 '22 • HM-T-419 4) Disconnect ThoG1 sensor. Detach the tie wrap band and insulation, and disconnect the ThoG1 sensor. When disconnecting the sensor, be careful not to damage it. 5) Cut the refrigerant pipe of water heat exchanger. ① Inlet side of refrigerant pipe Before cutting the refrigerant pipe, remove the drain hose.
Page 219 '22 • HM-T-419 6) Dismount the water heat exchanger. If the center pillar cannot be removed, pull out the water heat exchanger from left side by turning it anti- clockwise. 7) Clean the internal of new gas-cooler. Before replacement, supply water (about 3L or more) to the internal of new gas cooler. Tilt it several times to the left and right, and drainage.
Page 220 '22 • HM-T-419 9) Connect the water pipe. When connecting the water pipe, be sure to replace the O-ring to new one.
Page 221 '22 • HM-T-419 4.6 Cleaning procedure of CO water heater gas cooler Foreign matter, and scaling could build up inside the gas cooler of the unit in which CO and water exchange heat. The ancient depods depend on water quality. If it becomes too thick, it could effect flow rate and heating capacity. COP could drop or unstables control could also lead mismatch of hot water outlet temperature compared to the target temperature.
Page 222 '22 • HM-T-419 (2) Cleaning procedure The following chart shows the flow the steps required from evaluation for need of washing to end of clean up procedure. <Symptom of accumulated scale> Evaluation if clean up required. ・Water pump speed (Upper limit 4,000 min ), CWFV1 (Upper limit ①Judgment for need of washing 100%) nearly at upper limit value...
Page 223 '22 • HM-T-419 (3) Cleaning instructions 1) Turn OFF the power source to the heat pump water heater. 2) Connect pipes. 2-1) Remove the front panel (control BOX side) and the rear panels (2 pcs). 2-2) Remove the quick fasteners at A to C in the following figure. Note) If it is difficult to remove at A, remove the joint and screw from the hot water outlet pipe in the figure at right.
Page 224 '22 • HM-T-419 3) Set the washing equipment (provided locally). (Valve direction adjustment, water drain valve closure, etc.) 4) Feed water to the washing equipment and devices. (15 – 20 L) Note) Check for leak from the piping. Note) Capacity in the gas cooler piping is approx. 9L. Adjust the feed water quantity according to the washing cylinder.
Page 225 '22 • HM-T-419 11) Add the neutralizer gradually to neutralize the solution in the piping. (To pH 6 – 8) Note) Add the neutralizer carefully, gradually paying attention to the foam created chemical reaction, during the especially adding suddenly neutralizer. Note) Take care to avoid the air foam being trapped in the water pump.
Page 226 '22 • HM-T-419 4.7. Method of draining water from gas cooler If the heat pump water heater is left without power source in winter, water in the gas cooler may freeze, damaging the heat exchanger or causing problems at restart of operation. Please drain water from the gas cooler as follows prior leaving the unit deemergesed for long time.
Page 227 '22 • HM-T-419 3) Open the drain valve C to drain water. Close the valve after draining. 4) Disconnect the joints from the hot water supply and the water return pipe sides. Blow air from the hot water supply pipe joint till no water is forced out from the water return pipe any more. * When using a nitrogen gas container, or other, always set the pressure no higher than 0.4 MPa.
Page 228 '22 • HM-T-419 4.8 7-segment display and compressor stop factor Following list shows the codes used for the setting of option functions and for the adjustment of parameters at site. For the methods to change settings, refer to the 7-segment setting procedure on the page 103 (8.4)(b). Code No.
Page 229 '22 • HM-T-419 Code No. Data display Data display range Minimum unit Remark AC200V system external output 1 function 0: (Factory default) 0: Operation output 0 - 20 assignment 1: Error output (CNH3) 2: Compressor ON output 3: Fan ON output 4: Water shortage output 5: Water pump ON output 6: Anti-freezing circuit output...
Page 230 '22 • HM-T-419 (2) 7-segment code (C) list Code No. Contents of display Data display range Minimum unit Remark <Sensor & actuator> CM1 operating frequency 0−130 1rps CM2 operating frequency 0−130 1rps 1 ℃ Tho-A Outdoor air temperature L,-20−70 1 ℃ Tho-R1 Heat exchanger temperature1 L,-20−70 1 ℃...
Page 231 '22 • HM-T-419 Code No. Contents of display Data display range Minimum unit Remark Order of 100 ： CWFV5 0 ， 1 ― Order of 10 ： CWFV6 CWFV opening (0 ； Close, 1 ； Open) Order of 1 ： Spare Order of 100 ：...
Page 232 '22 • HM-T-419 • Operation mode can be confirmed from Mente PC or 7-segment display (C79) Operation mode Cylinder type In case of day off setting Vented Stop Available Available Unvented Vented Top up operation Available Unavailable Unvented Vented Available Keep warm operation Available (Vented cylinder only)
Page 233 '22 • HM-T-419 (3) Compressor stop factor １．１．Comp stop factor(Outline) Comp stop factor(Outline) It can be confirmed the number of compressor stop factor from Mente PC or 7-segment display (C88). Compressor stop factor is remained until occuring next stop factor. [Example] be confirmed the number of comp stop factor from mente PC or 7seg (i) Compressor stop factor (55) is caused by HP protection control.
Page 234 '22 • HM-T-419 Compressor stop factor Number When power ON Ambient temperature sensor Heat exchanger temperature sensor 1 (Tho-R1) Heat exchanger temperature sensor 2 (Tho-R2) Heat exchanger temperature sensor 3 (Tho-R3) Heat exchanger temperature sensor 4 (Tho-R4) Discharge pipe temperature sensor 1 (Tho-D1) Discharge pipe temperature sensor 2 (Tho-D2) Suction pipe temperature sensor 1 (Tho-S1) Suction pipe temperature sensor 2 (Tho-S2)
Page 235 '22 • HM-T-419 Compressor stop factor Number HP1 Anomaly 　　※ 63H1 activation ， HP ≧ 14MPa LP1 Anomaly 　※ LP ≦ 1.0MPa 【 System anomaly 】 Td1 Anomaly 　※ Td ≧ 135 ℃ Open phase on power source, Reverse phase on power source CPU communication error FMo1 anomaly FMo2 anomaly...
Page 236 '22 • HM-T-419 4.9 How to reset the accumulated water pump and compressor operating time Timing to be displayed about periodical check 1, 2 & oPE-1 – 3,11 – 13 Q-ton announce the maintenance code and periodic check by the cumulative operating time of the water pump and compressor.
Page 237 '22 • HM-T-419 4.10 Reference for control PCB replacement When changing control PCB, make sure to save/transfer below data as following below procedure. Item Content 60 − 90 ℃ Target HW temperature 0 − 255 Accumulated compressor operating time 0 − 255 Accumulated water pump operating time <Procedure for data save>...
Page 238 '22 • HM-T-419 4.12 When power off in multiple unit system (1) In case of 1 remote control & multiple units (a) Prior to W23R-2.1 If 1 group is OFF in combination system, all of unit can not restart by itself. If 1 group is OFF in combination system, all of unit can not restart by itself.
Page 239 '22 • HM-T-419 ③ If the unit is power ON again, communication will re-start. But operation status will be stop. ④ Therefore please press Run/Pause button on R/C. At this time E1 will be reset. 「Unit protection stop」 Power will still be displayed. source breaker Press Run/Pause...
Page 240 '22 • HM-T-419 4.13 Additional information for tank temperature sensor connection (1) Mounting method of temperature sensor When attaching the temperature sensors on the hermetic type hot water cylinder, take the following cautions into consideration. ●Use aluminum adhesive tapes capable of withstanding temperatures higher than 90℃, with care to stick the sensors firmly to the surface of cylinder.
Page 241 Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice. Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice. Copyright MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD. © Copyright MITSUBISHI HEAVY INDUSTRIES, LTD.

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