Toshiba Heat Pump MMY-MAP0501HT8-E

Refrigerant Recovery When Replacing the Compressor

How to operate the system during repairing of the defective; outdoor unit

1. Follow to the above mentioned “13-1. Refrigerant; Recovery; in the Troubled Outdoor Unit”.

2. Next, recover the refrigerant in the system by using a; recovery device, etc.

The refrigerant amount to be recovered is determined; based; upon the capacity of the troubled outdoor unit. (See; the; following table.); Example) In a case of backup for 10HP-outdoor unit in; 30HP; system:

in the original system HP (30HP system) = 36.0kg

Refrigerant amount in system HP (20HP system) after; backup; = 27.0kg

Refrigerant amount to be recovered = 36.0 – 27.0 = 9kg

P.C. Board Exchange Procedures (Outdoor Unit)

How to Check Fan Power Supply P.C. Board and Fan IPDU

The fan power supply P.C. board supplies DC power. It; supplies; DC280V for the fan IPDU, and DC12V and DC7V; for the control; power supply respectively. If the control; power is not supplied,; a communication error (Error code; [E31]) is out.

1. How to check fan power supply P.C. board (MCC-1439)

As shown in the following table, measure the voltage of the; check positions with a digital tester.

1. Check that the lead wires are correctly inserted into 250; fasten terminal of DC280V input and into the; communication; connector (CN01).

2. After then replace the fan IPDU if an abnormality is; recognized.;