To repair the cooling systems, (1-3) through (1-7) must be completed before work is performed on the systems. All maintenance personnel and others working in the local area must be instructed in the nature of the work being carried out. Where electrical components are replaced they must be fit for purpose and to the correct specification.
This will be reported to the owner of the equipment so that all parties are notified. Before recharging the system, it must be pressure tested with the appropriate purge gas. Equipment must be marked indicating that it has been taken out of service and drained of refrigerant.
In addition, a set of calibrated scales should be available and in good working order. The recovered refrigerant will be returned to the refrigerant supplier in the appropriate recovery cylinder and the appropriate waste transfer note will be adjusted. The evacuation process must be carried out before returning the compressor to the suppliers.
Only electrical heating to the compressor body may be used to speed up this process.
FAN PERFORMANCE AND CORRECTED AIR FLOW
PEAD-M35JA(L)
PEAD-M50JA(L)
PEAD-M60JA(L)
PEAD-M71JA(L)
PEAD-M100JA(L)
PEAD-M125JA(L)
PEAD-M140JA(L)
5-1. Sound pressure level
5-2. NC curves
6 OUTLINES & DIMENSIONS
INDOOR UNIT
If the inlet duct is used, remove the air filter (supplied with the unit) and then install the filter (optional) on the suction side. Terminal block (Remote control transmission line) Control box Terminal block (Indoor/Outdoor connection line) Drain pipe (O.D.ø32). Seen from the direction of the arrow A) Access door 2. Access room for maintenance Indoor unit bottom.
Viewed from the direction of the arrow B) Access door 1. Secure enough access space to allow for the maintenance, inspection and replacement of the motor, fan, drain pump, heat exchanger and electrical box in one of the following ways. Select an installation location for the indoor unit so that its maintenance access space will not be obstructed by beams or other objects. Access door 2 is not required if there is enough space under the unit available for a maintenance worker to work in.).
Create access door 4 under the electrical box and the unit as shown in Fig. Maintenance access compartment The bottom of the indoor unit. Seen from the direction of the arrow B) Access door 4. ONLY FOR PEAD-M·JA CN4F. IN CASE OF CONNECTION OF REPLACEMENT WIRES). Since the electrical wiring on the outdoor side may change, be sure to check the outdoor unit electrical wiring for service.
8 REFRIGERANT SYSTEM DIAGRAM
9-1. CAUTIONS ON TROUBLESHOOTING
9-2. TROUBLESHOOTING
If the unit cannot be operated properly after the test run is completed, refer to the following table to eliminate the cause. In approx. 2 minutes after startup, operation of the remote control is not possible due to system startup. For the description of each LED (LED1, 2, 3) on the indoor controller, see the following table.
This LED lights up only in the case of the indoor unit connected to the outdoor unit's refrigerant address "0".
Wireless remote controller
If the unit cannot be used properly after performing the above test, refer to the table below to remove the cause. For about 2 minutes after power on, remote control operation is not possible due to system initialization. Output pattern B] Errors detected by the unit other than the indoor unit (outdoor unit, etc.) Wireless remote controller.
Compressor overcurrent cut/abnormal from power module Abnormality of overheating due to low discharge temperature Abnormality such as overvoltage or undervoltage and abnormal synchronous signal to main circuit/current sensor error. Pipe sensor error (liquid or 2-phase pipe) Indoor/outdoor unit communication error Drain sensor error. 1 If the beeper does not sound again after the first two beeps to confirm that the self-check start signal has been received and the OPERATION INDICATOR light does not illuminate, there are no errors.
2 If the beeper sounds three times continuously "beep, beep, beep sec.)" after the first two beeps to confirm that the self-test start signal has been received, the specified refrigerant address is incorrect.
AUTO RESTART FUNCTION
If there is extreme difference with the actual pipe temperature
2 Abnormal if the sub remote controller could not receive any signal for two minutes. 1 Abnormal if indoor controller board normally cannot receive data from remote control board or from other indoor controller board for three minutes. 1Check for disconnection or looseness of the indoor unit or remote controller transmission line. 2 Set one of the remote controls to "main".
If the device is not normal after replacing indoor controller board in group management, indoor controller board with address "0". 2Indoor controller board receives transmitted data at the same time, compares the data, and when detected, evaluates the different data as abnormal 30 continuous times. When it becomes abnormal again, replace the indoor controller board. b) When "RC NG" is displayed, replace the remote control. c)When “RC E3” or “ERC 00-66” is displayed, noise may cause abnormality.
In this case, E0 is displayed on the remote control and E4 is displayed at LED (LED1, LED2) on the outdoor controller PCB. 3 Wrong wiring of the remote control 4 Defective reception during shipment. remote control circuit 5Faulty transmission and reception. indoor controller board circuit with refrigerant address “0”. 2Faulty indoor controller board transceiver circuit. 3Faulty transceiver circuit. indoor controller board circuit 4Sound has entered indoor/. Check the LED display on the outdoor unit control board. Other indoor controller boards may be defective in the case of a dual triple indoor unit system.
3 Consider the device abnormal under the following conditions: When two or more indoor units are connected to an outdoor unit, the indoor controller board cannot receive a signal for three minutes from the outdoor controller circuit board, a signal that allows the outdoor controller circuit board to transmit signals. Abnormal if data cannot be read normally from the non-volatile memory on the indoor controller board. 3Check the room temperature display on the remote control and the indoor pipe
9-4. TROUBLESHOOTING OF PROBLEMS
9-5. TEST POINT DIAGRAM
9-6. TROUBLE CRITERION OF MAIN PARTS
9-7. Thermistor
Do not pull out the connector (CNMF) for the motor with the power supply on. This causes trouble of the indoor controller circuit board and fan motor.) Self-check. NG Wiring contact check Contact of fan motor connector (CNMF) Check the fuse (FUSE) on indoor control board. Power supply check (Remove the connector (CNMF)) Measure the voltage in the indoor controller circuit board.
Check method of DC fan motor (fan motor/indoor controller circuit board)
The pair number settings of the wireless remote controller and the indoor control circuit board (J41/J42) are shown in the table on the left. in the table indicates that the jumper line is disconnected.). In the figure on the left you can see that switches 1 to 5 are ON and 6 to 10 are OFF.
9-9. FUNCTIONS OF DIP SWITCH AND JUMPER WIRE
Each function is controlled by the dip switch and the jumper wire on control p.c. board
SW1 and SW2 are equipped only for service parts
Model setting and capacity setting are memorized in the nonvolatile memory of the control p.c. board of the unit
- Control box
- Thermistor (Intake air)
- Drainpan
- Thermistor (Condenser/evaporator) (Liquid pipe)
- Heat exchanger
Removing the filter and bottom plate (1) Push the tab on the filter up and pull it out. filter in the direction of arrow 1. 2) Remove the fixing screws on the bottom plate (D), (E) to remove it. Fan Motor and Sirocco Fan Removal (1) Remove the two motor mounting screws on the. remove the Sirocco motor and fan in the direction of arrow 3. 2) Remove the four fan housing mounting screws to remove the upper half of the fan housing. Removing the fan housing (bottom half). 1) Squeeze the tabs on the fan housing to remove it in the direction of arrow 2.
Removing the filter and base plate (1) Press down on the tab on the filter and pull it out. the filter in the direction of arrow 1. 2) Remove the mounting screws on the bottom plate (J) to remove it. Remove the heat exchanger cover following the procedure in section [4] 2. 1) Remove the five mounting screws on the cover (K) to remove it.
