Control Outline - Toshiba MMW-AP0481CHQ-E Service Manual

6. CONTROL OUTLINE

No. Item
1 Upon power 1. Identification of outdoor unit
supply reset
2. If power supply reset is performed in the wake of a trouble, the check code is cleared.
2 Operation 1. The operation mode changes in response to an operation selection command
selection
3 Water outlet 1. Adjustment range - remote controller temperature setting (˚C)
temperature
control
4 Water If a hot water outlet temperature (TWO) is lower than thermal ON temperature,
temperature a compressor in high temperature HWM starts operation, if TWO is higher than thermal
control OFF temperature, the compressor stops the operation. However, the compressor
continues its operation until minimum operation time passes since the compressor in
high temperature HWM started operation.
(5 minutes in outside temperature 0 , 10 minutes in outside temperature -20 )
HWM controls a compressor operation frequency of the high temperature HWM so that
TWO approaches temperature setting (TWS).
If TWO becomes higher than 92.5 , the compressor of high temperature HWM may
stop the operation even before the minimum operation time passes.
Thermal OFF temperature
(Temperature setting + offset OFF)
Thermal OFF temperature
(Temperature setting + offset ON)
5 Heater control 1. While the heating themal ON, the heater relay is output by difference between
When the power supply is reset, the outdoor unit is identified, and control is
redirected according to the identification result.
If the abnormality persists after the Start / Stop button on the remote controller is
pushed to resume operation, the check code is redisplayed on the remote controller.
issued via the remote controller.
Remote controller command
STOP
HEAT
HEAT
Wired type 50~82
Temperature [˚C]
Temperature setting
Value of Offset OFF or Offset ON is variable depending on water temperature or
compressor frequency of high temperature HWM in thermal off.
Ts and TWI, and difference between Ts and TWO, Ts and TG.
Start condition: A and B as shown on the right, Table 1 or Table 2
Release condition: A or B as shown on the right, Table 1 or Table 2
(˚C)
P1
Q1
Specifications
Control outline
Hot water module shutdown
Heating operation
Thermal control image
Water outlet temperature
Water inlet temperature
Table 1
P1
Q1
Heater : ON
Table 2
Ts – TWO
Heater OFF
P1
Q1
– 18 –
TWO: Water outlet
TWI: Water inlet
1~3˚C
2~5˚C
Time
TG: Saturation
Ts: temperature
Ts – TWI Ts – TWO
(A) (B)
7K 2K
5K 0K
Ts – TG
(A) (B)
2K –11K
0K –14K
Remarks
temperature
temperature
temperature of
discharge
pressure
setting